Well, I don't know Ohlsson's performance, but Ogdon seems to have more of a line to it than Hamelin's (although I admire Hamelin's account). Ogdon is majestic and perhaps less "flashy" than Hamelin. It's difficult to be precise without getting them out and playing them 'side by side', as it were. I got to know the work in Ogdon's recording (on cassette), which, I think, was the only one available back in the 1970s, and it won me over completely. I loved it straightaway. I'm aware these comments are not particularly helpful, and maybe the work is just not for you... which, of course, I respect.