So long as we can all agree to disagree.
Between just those two, it's a tough call. Call me nutty, but I kinda liked the PS2 platter better. But the 500 has better effects. But I like where the PS2 Play/Cue buttons are. But the 500 has the visual cue. But the PS2 has a Bop button....this could go on all night...
Best bet is to try out each model yourself. Sage advice that gets handed down generation to generation. Everyone has a different style, likes a different feel, has different needs. Get your hands on some decks and give it a spin. You'll quickly find out what works for you and what doesn't.
Me, I'll take a Fisher-Price My First DJ kit over anything and rock it like a bull llama.