Out of these 2 airsoft pistols which one?

They don't know what they're talking about. 305 fps is not slow by any means. But I personally would rather the M&P 40 spring pistol. Spring pistols are generally faster than electric ones. At least the ones at the same price range. However, if you really want an electric pistol that is fast, you might want to check out the CYMA CM030 glock. It is a really awesome gun, but they don't come cheap. : )