TRS-80 Model 12 versus 16B

[Jim Brain via cctalk]

Been trying to Google things, but not having a lot of luck.  I 
understand both are white case, both have slimline drives, 12 had no 
card cage, I think I read somewhere that the 16 came with 68K std (no 
Z80?), and 12 had KB conn on case, 16B had KB conn on KB. Beyond that, 
though, would love more information.

Lots of info on 2 and 6000, but not so much on the intermediate machines.
Jim