One was a study in tension and nothing more, really. It developed around one central motivation, and was targeted towards a single emotional response. The effects in Gravity were simply an excuse to heighten tension...and it worked. I agree that it is best achieved in a proper theater, with proper equipment, but how else do you portray the complete isolation of a cosmic vacuum? It's nothing more than trying to take something like...the Mona Lisa (mystery/perspective), and recreate another singular conceit (isolation/tension) in a different medium.
The other is a pseudo-complex mind fuck with grand aspirations....whether or not they achieve that is a different thing for another discussion--but yeah, Interstellar is vastly more complex in terms of plot, character, and design, and in no way was a film designed soley to exploit a singular emotional response.
Oh, you're talking technically--yes, that can be argued,certainly. to claim that it "crushed" Gravity, whatever that means, in terms of character, story, cinematography, whatever...that isn't even worth discussing.
even cinematography--both projects more or less created new techniques to film things that had not been filmed before. played with sound in ways that had not been explored before (Well, except Nolan--he fucks up sound on purpose, all the time! ). Anyway: apples and oranges, more or less.