The 101 is the model shaped and colored much like a
VT100. The
keyboard looks similar (except for logos, IIRC), but
its protocol is
_not_ compatible with the VT100. Nothing blows up,
but if you get the
keyboards mixed up, nothing works, either.
Good thing I didn't buy the one on eBay a couple
months ago. There was a 101 there, and cheap too, but
it had no keyboard. I wasn't sure if I could use a
VT100 keyboard, but I guessed not, since I know a lot
of the VT220 clones had similar looking (and
incompatible) keyboards.
-Ian