Samsung Questions & Answers
Better than the iPhone 4 & HTC EVO 4G?

If speed is what you're looking for, I think the Galaxy leads the pack among all smartphones right now! Plus it's not your ordinary Samsung touchscreen phone as it's build quality easily is top-notch. EVO may have 4G and the iPhone 4 may have a higher resolution display, but Super AMOLED takes the cake with the 1GHz Hummingbird processor easily beating both!
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Super AMOLED (Galaxy S) or 4G (EVO) ... I'd go for HTC.
Android (EVO) or iOS (iPhone) ... I'd go for iPhone :)
It's tough man. When I saw the galaxy s, I was blown away to see that it was made by Samsung. Plus super amoled looked a lot better than my 3GS. But I'm contemplating whether or not to buy the iPhone 4