Panasonic makes the Toughbook i believe actually.
Both the MBP and the T61 have sudden motion sensors iirc which means that for minor falls and whatnot, your data is safe, even if the rest of the system is not. I know that the T61 has things like a magnesium endoskeleton, and you know, other things, whereas the MacBook Pro has the anodized aluminum exoskeleton so for things like flexing, and overall 'strength' i think that the T61 might win out, but I think that the MBP is more versatile in terms of what you can run on it.