The difference being that one fights at LHW often while the other has never left WW. I realize you're trying to make a point, but at least appreciate that there are differences between GSP vs. Silva and Silva vs. Jones. Silva just threw Stefan Bonnar - a large LHW - around like it was nothing. GSP would clearly be giving up more size to Anderson than Anderson would to Jones. I'm not saying it's an excuse, but treating GSP vs. Silva as similar to Silva vs. Jones is reaching.
Anyway, all of this is getting tiresome. If the fight happens, then great. Needless to say the contract won't be signed because of the bickering of a few fanboys on MMAF.