if I was going by specs I would say the photon. but by user experience I would say get a wp7 phone (HTC Arrive) especially with mango out now. this video will give a comparison between the two:
http://m.youtube.com/#/watch?v=IKfvUIZn7PA
after showing this video to one of my friends with an iPhone she said that it makes her iPhone seem all sucky and boring while still pretty.