Do you think I would be able to use the same ZIP I used for my Razr to install ICS on a Droid 4 and a Bionic? They're both Moto and both are on 2.3.6.
The Razr has an ICS zip
The Droid 4 has it's own ICS (leak) zip
The Bionic has it's own ICS (leak) zip
Neither is compatible with the others, have checks in them to make sure they are being installed on the appropriate device and will fail. It's a good thing they fail too...as it would be much worse if they installed (different devices with different hardware specs/features).
Look in the Droid 4 seciton "Droid 4 Roms" and look in the Bionic section under "Motorola Droid Bionic"
.213 is latest for Droid 4
.2233 is latest for Bionic (I think that's the number)