Forty-eight hours earlier than President Biden and former President Donald J. Trump clashed onstage in Atlanta on Thursday, the leaders of Britain’s two main events, Prime Minister Rishi Sunak and Keir Starmer, went head-to-head in Nottingham, England.

To say their debates have been completely different doesn’t start to seize the Atlantic Ocean-sized chasm that separated them.

In content material, tone and ambiance, the British debate showcased two politicians of their prime, sparring over the problems — ceaselessly heated, not with out private jabs, however targeted on the coverage nuances of taxes, immigration and well being care. Neither Mr. Sunak, 44, nor Mr. Starmer, 61, introduced up his golf handicap.

Britain and the USA are sometimes seen as working beneath the identical political climate system — the conservative flip to Margaret Thatcher and Ronald Reagan, the pivot to youth and the center-left with Invoice Clinton and Tony Blair, and the anti-establishment, populist backlash that fueled Brexit and Mr. Trump. However this week’s back-to-back encounters confirmed how sharply these democracies have diverged, at the least on this election cycle.

“These are two international locations in very completely different locations, with very completely different views of their place on the planet,” stated Kim Darroch, who served as Britain’s ambassador to Washington throughout the Trump administration.

“The tone between Sunak and Starmer was that of two profoundly earnest politicians,” Mr. Darroch continued. “Between Biden and Trump, it was barbed, it was nasty, it was infantile, however it was not earnest.”

To some extent, that displays the completely different nature of the candidates: Mr. Sunak, a one-time hedge fund supervisor, and Mr. Starmer, a former public prosecutor, are extra technocratic, detail-oriented figures than Mr. Trump or Mr. Biden. Neither is called a charismatic politician.

In addition they have little of the private animosity between the 78-year-old Mr. Trump and the 81-year-old Mr. Biden. Each entered Parliament in 2015, and so they scarcely knew one another till Mr. Sunak grew to become prime minister in 2022.

However the completely different tone additionally displays how British politics has moved on from the poisonous divisions over Brexit. Eight years after Britons voted to go away the European Union, they’ve returned to extra peculiar debates over taxes, spending, planning permits for housing, and easy methods to reduce ready occasions within the overburdened Nationwide Well being Service.

“Sunak tried early within the marketing campaign to deliver some American-style culture-war points into the talk, however there was no urge for food for it,” stated Robert Ford, a professor of political science on the College of Manchester.

There was additionally a change in Britain’s political personalities. “Who was absent from that stage? Boris Johnson,” stated Professor Ford, referring to the flamboyant prime minister who led the Brexit marketing campaign and drew comparisons to Mr. Trump.

Mr. Johnson was ousted by his Conservative Occasion after scandals, together with social gatherings held throughout pandemic lockdowns. His successor, Liz Truss, lasted solely 44 days after her tax reduce proposals ignited a backlash in monetary markets.

“Our system appears to have more healthy formal and casual mechanisms to do away with leaders,” Professor Ford stated. “With Biden and Trump, there aren’t any apparent mechanisms to do away with them,” apart from defeating them on Election Day.

When voters go to the polls in Britain on July 4, they’re anticipated to oust Mr. Sunak’s center-right Conservative Occasion after 14 years in authorities, in favor of Mr. Starmer’s center-left Labour Occasion. The controversy was seen as one among Mr. Sunak’s final probabilities to avert a landslide defeat.

The prime minister drilled into arguments that the Labour Occasion would increase taxes and throw open Britain’s borders to immigrants. “Don’t give up,” Mr. Sunak repeated a number of occasions to the studio viewers (one other distinction with the talk in the USA, the place there was no studio viewers).

Mr. Starmer’s offended response that the prime minister was mendacity about taxes was the closest the 2 got here to the blows traded by Mr. Biden and Mr. Trump. In any other case, he earnestly laid out the occasion’s plans to construct 1.5 million new homes, calling the shortage of inexpensive housing the “tragedy of the final 10 years.”

There have been loads of critics of the talk. Some faulted Mr. Sunak for being unduly aggressive, bullying Mr. Starmer. Others stated Mr. Starmer was unsteady, significantly on how he would attempt to curb the inflow of asylum seekers crossing the English Channel.

The back-and-forth over taxes struck some as tedious. The author Jonathan Coe in contrast it unfavorably to the video games of the European soccer championship, which have been being broadcast on the identical time on one other channel.

“Can I bear to spend one other hour watching these folks pointlessly kicking a ball backwards and forwards to one another, or ought to I flip over and watch the soccer as an alternative?” Mr. Coe posted on X.

Televised debates, Mr. Darroch famous, are a relatively current American import to British politics; the primary between contenders for prime minister have been held in 2010. In contrast to in the USA, the place they’ll change the trajectory of a marketing campaign — as many Democrats concern that Mr. Biden’s faltering efficiency will — debates not often shift public sentiment in Britain.

For one, British politicians debate one another virtually each week within the Home of Commons. Mr. Sunak and Mr. Starmer have confronted off dozens of occasions throughout Prime Minister’s Questions, a Wednesday ritual by which the chief of the opposition grills the prime minister, whereas journalists maintain rating.

“For those who’re each good at debating, it turns into very tedious as a result of nobody is making large gaffes,” Mr. Darroch stated. “The British public is anticipating a recreation of cricket, not too many low blows. We reside in a grayer world of politics, in comparison with the Technicolor of the debates within the U.S.”