I think the big difference between The Imitation Game and The Theory of Everything is that the latter is about a well-known, living scientist while the former is about a lesser-known, dead scientist.
Thus, the focus of The Theory of Everything is on Stephen Hawking’s personal life, his relationship with his wife and family, and the toll of ALS. Some were disappointed that the emphasis was not on his science, but one can learn that from books and documentaries. He has, after all, lived a long life and his work is well known. I thought the movie did a very good job of humanizing him.
Alan Turing, on the other hand, is less well-known and so the movie focuses on his most significant accomplishment – cracking the Enigma code which helped turn the tide of the war. That he was a war hero and one of the fathers of the computer, yet was persecuted after the war and driven to suicide is tragic. This is also emphasized in the film.
I thought both films struck a good balance in showing a side to these extremely influential scientists that the general public may not have been aware of. I think The Imitation Game is more of a “best picture” type film than The Theory of Everything, although I would take Eddie Redmayne over Benedict Cumberbatch as “best actor” for his performance which often required acting without speaking.
Coach Bob knew it all along: you've got to get obsessed and stay obsessed. You have to keep passing the open windows. (John Irving, The Hotel New Hampshire)