To get A 450 to run as hard as a 650... you gotta sacrifice some reliability.
It's common sense, the 450 will have to work a lot harder than the 650
to develop similar power etc... Either that or build the working parts out of
something thats stronger than what's currently being used to get it to last
longer.... now, if they had stronger materials that were cheap, it wouldn't
cost an arm and a leg to build, that would be nice.
Then again the next gen 650 could be built using the "better" materials
and they'll be able to get it to go faster too...