Different materials is the main difference. The green one has a nato body, maple neck and rosewood fretboard, neck through I think. Whilst the white one has basswood body, and that's the main difference.
Well, you can call me crazy
You can call me wrong, 'cause
See I was born a liar, albatross
Fly on, fly on
The recommended retail price of both is the same, so maybe you're just getting a better deal on the white one

that guitar is like falling in love with a stripper
modded Squier Strats