Difference between Rolex Explorer 2. Model 16570 (on the left, black) and Model 216570 (on the right, white)

16570:
1)40 mm case
2)Slimmer case
3)smaller hour, minute, and seconds hands
4)red GMT hands
5) calibre 3185 or 3186 depending on the production year.

216570:
1)42 mm case
2)Thicker case
3)Larger hour, minute, and seconds hands
4)Orange GMT hands and orange text
5) calibre 3187😎