How much benefit does the 90nm give over the 130?

40 nm difference in distance for electrons to travel (an odd sort of historical example is the first supercomputer CRAY was built like the cooling tower of a nuclear power plant so that the wires were all of equal length and some of the timing was done by lengthening some of the wires - uh...) where was I, oh - yeah, that is almost 33% decrease in distance for signals to travel. If you are a gamer or into graphics/video, that would make a difference.

The 90 nm is the newer Winchester (Winnie)
GrimJack
Sufficiently advanced incompetence is indistinguishable from malice.

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There is also a significant difference in power consumption and heat dissapation.