I don't know about "worse", but unless things have changed in the past few years, yes, I'd say it's a "traditional" interview ("code up a rough solution to this algorithmic problem on a whiteboard/laptop"), and yes, I'd say it's harder - they're widely considered to be some of the hardest interviews in the industry, and personal anecdote for confirmation: about five years ago I interviewed at Jane Street and Google on subsequent days. The Jane Street interview was one of the most exhausting batteries of my life; by comparison the Google one was a cakewalk.