n 95 vs e 90

Depends what you want the phone for really. The E90 is better in the sense that it has a QWERTY keyboard, more RAM for running programs, a larger battery and a large, high resolution internal screen. The N95 is better in that it has a better camera, it's quite a bit smaller and lighter, and it's also cheaper and more widely available. If you're looking for what mostly amounts to a phone with multimedia features, the N95 is best. If extended text entry and office-type usage is more important, the E90 is superior. The keys are still quite small though - we're talking about typing out emails faster, not your next novel.

I would have considered an E90 if they were available on contract, but they're not in the UK as far as I know, and I might well have been turned off by the weight (210g vs 120g) and length (132x57x20mm vs 99x53x21mm) for a device I carry in my pocket. If I was carrying it in a bag, then obviously those would be irrelevant. It's not into 'clown pants' territory, but I already carry a lot in my pockets.

Also, the N95 8GB has been announced for release reasonably soon, which will have the same amount of RAM as the E90 and an improved battery, which is worth bearing in mind.