With Maya 2008, I am using render on 2 different machines, to compare speed/results/etc.

After rendering, I notice the following:
- on Machine #1 (Windows XP, Dual Core CPU, 2 GB RAM): each frame file (.iff) is approximately 7.6 MB
- on Machine #2 (Windows Server 2003, 2 x dual core CPU, 2GB RAM): each frame file (.iff) is approximately 5.8 MB

Why am I getting different .iff file sizes between the two machines although I am using the same "render" command line and the same model of course?

Isn't "render" platfrom independent? Is there a way to make it platform independent?

Thx a lot