[tellyblues]

Hell's Kitchen is different in that the show is set in a kitchen of a restaurant (or at least, a pretend one) whereas with Masterchef it's just a kitchen and there's more interaction between contestants and multiple dishes having to be served up so a lot more time-critical moments.

Yeah, Ramsay going nuts is one aspect that sells the format and the original UK show only had that for the first series as he was replaced by Gary Rhodes and Jean-Christophe Novelli for the second, which was also different in that it had ordinary members of the public as contestants as opposed to celebs. They returned for the third and fourth series with Marco Pierre White as the chef so maybe the constant changing of the format and the talent is why it didn't last particularly long. It didn't outstay its welcome so there is that and 15 years is probably long enough to be away in TV terms.