4 cores or 8 cores?

[YukiHerz]

What matters the most is the speed of a single core, for PCs as long as you have at least a 1.6Ghz you'll probably be fine, i assume the range for mobiles would be similar, though the htc one m9 seems to have superior cpu, it doesn't just have 8 cores, it has 2 quad core cpus, both different, i dunno if that could make something go awry.