i prefer the evo line. except for galaxy note, and even there the evo is more solid, smoother, and just plain better. and im using a two year old evo, mind you, that i got cheap off craigslist recently after my iphone 4s was stolen. so im saying a creaky old the year before last years evo hands down beat both galaxy s 2s. (why did i get a second one? first one was defective. as were two shiny new iphones. the note was pretty nice, tho).
i havent tried the 3 but i spent an afternoon with the latest evo. it equals and even bests iphone, in some areas.