bicycle_repair_man :
Two threads are insufficient for gaming, even if the CPU can be overclocked. An i3 is the minimum you need.
No they are not,console devs are insufficient for PC coding...
On topic, the 4150 runs at 3,5 so 500Mhz is going to make only a little difference and only in a few categories like emulation some strategy and the likes,where hyperthreading is going to make a much bigger difference in most modern games.
It all comes down to what you like to play most. (I'm assuming gaming here if not please state so)