... of servers in USA and in Europe?

Say, GoogleRobot. Will it index faster a 10000 pages on a server in Texas as compared to the selfsame 10000 pages on a server in Frankfurt a.M.? And create thus more CPU load? Or there are some other dependences?

I would appreciate your assumptions, observations, and suggestions.

In short, when there are 200 bots on a site indexing identical pages, which server will be loaded more - the one in Texas, or the the other in Frankfurt?