All personal opinion. I've only tried the flip HOLE white and the flip HOLE black. The black feels tighter, has a slightly stiffer material, and has a more "aggressive" texture with a lot of "sharp" edges (as opposed to gentle round edges in the white model).

For me, personally, the flip hole white is total heaven. I can go for hours with it if I had the time (I'm multi-orgasmic).

Since I'm not into the "death grip", I didn't really like the black one at first. However, after a little more experimentation, I found that using a really light lube instead of one of the thicker ones worked really well with the black one.

My understanding is that Tenga is making the white models less "stimulating" than the black ones, so there should be a similar difference between the black and white flip AIR models.

Also, Tenga makes "lite" versions of these products. I've read a lot of complaints about them being too small for average guys. There is a size chart floating around the forum that gives a reasonable description of the size ranges for each of the Tenga products.