It basically makes it EASIER on the suppliers (ie Charlie_PS2)...
Instead of having to carry 4-5 different chips, he only has to carry 1...
If I was going to guess, I wouldn't think there would be much of a price difference between the two....
And there is no questions about if it will work in a certain version, and you don't have to make sure which version you have...
Just order the Messiah 2 Pro and you set...