This is what separates the men from the boys. The wireless network the device runs on.
The HTC EVO 4G runs on Sprint's 4G WiMax network, in areas where WiMax is available. The turbo-charged 4G network has peak download speeds of more than 10 Mbps, about 10 times faster than 3G. When 4G isn't available, the HTC EVO 4G leverages Sprint's 3G CDMA network.
The Apple iPhone 4 runs on AT&T's 3G network and falls back on quad-band GSM in areas where 3G is lacking.
Winner: HTC EVO 4G. The name says it all. 4G. While it's not available anywhere yet, HTC is the first to market with a commercially available 4G phone. That's a big deal.