Surprised no one has said "Neither get a ....." :mad2: Hate when I see that. So already the OP has stated cost isn't an issue, weight isn't an issue. People keep saying get a 460 and port it, and it is faster than a stock 660. Well that's kinda like saying Dale Jr's Chevy is faster than the one you get a dealer... DUH the saw has been internally modified. Do the same work to a 660, and then what?
So stock for stock, the 660 vs. the 460, cost and weight are not factors. That leaves really only power and fuel usage.... and those are items on the opposite ends of the spectrum for both saws... He has a 361, as did I when I went through the same thought process the OP is, the jump from the 361 to 460 in published specs is similar to the jump from 460 to 660. I couldn't see getting a 460 and going up only ~10 cc why not jump in fully and grab the 660 and be done with it.
Comparisons need to be made tic for tac, stock vs stock, or modded vs modded..... its only fair way to go about it.
dw