Are most USB bluetooth adapters the same?

I am going to buy a USB Bluetooth adapter for my Fujitsu N3010 laptop.
At this point I have a Belkin/Fortuna BT GPS and will be adding a BT
mouse of some sort. In the future there could be a Bluetooth PDA
and/or telephone. Does the brand of adapter matter? What about
software that is bundled with the adapter? There doesn't seem to be
much difference in price between the Type 1 or Type 2 adapters. Any
reason not to just go with the type 1 in case a future BT device can
use it?
TIA,
-cadjak