Toshiba Fax Kits, GD-1150/1200...

[Oystercopy]

Does anyone know, VISUALLY, what the difference are between these two kits?? I have two of them side by side and I'm trying to figure out by part number what the differences are. Since there's no label or sticker, and the hardware is virtually identical, how do you tell them apart? I'm pretty sure Checker or Spock might know this...
Thanks in advance!
OC

[Mr Spock]

I believe there are 2 main differences. One is a "plug" that is on the 1200 and not the 1150. The second is the added power supply (only on color machines). Most other parts are the same.

[famko1975]

I believe there are 2 main differences. One is a "plug" that is on the 1200 and not the 1150. The second is the added power supply (only on color machines). Most other parts are the same.

Where is the plug on gd1200 that isn't on 1150? I have tried to install 1150 on 281c and the copier have recognized the board but have problem rx and tx. I think that aren't compatible. Can you help me?