Question

What is the difference between PS2 and PS4.....pls explain???

And also tell the cheapest PS2 and PS4.......

Answer 1

Well, a PS2 is less expensive. It has wired controls. It has a lot less games and memory than a PS4. I mean, to save the profile of one game, they give a memory card of 8 MB.
PS4 supports lot more games, has wireless controls and has memory more than 1 GB.

Answer 2

Now days the one difference making between them are it's pixel quality and its control.
Sony's Ps4 and Ps2