Portable Monkey has compared and contrasted the Eee PCs S101, S101H, and 1002HA. And this is what he has to say about the three netbooks:
The similarities of all three ASUS Eee PC S101, S101H and 1002HA can be confusing and honestly, I can’t see a point to the S101H. The S101H is as we know, “the S101 but with a hard disk drive, instead of an solid state disk” but it’s actually half way between the S101 and the 1002HA. The differences are all so minimal though and don’t amount to much. I would either stick to the 1002HA and save money, or go for complete mobility and battery life with the S101. The S101H is in the middle, no man’s land…