Where does 1586 and i686 break?

[Audioslave - 7M3 - Live <creed7m3live@xxxxxxxxxxxxxxx>]

In reference to kernels and microprocessors. I have a pentium II
(Dechutes) and was wondering where the I686 build is supposed to be used
at.

When I compiled the 2.5.70 kernel, I chose the MMX processor type. I was
wondering if the i686 would be a better choice.

Also, is a pentium II with MMX technology (dechutes) better than a
Celeron?

Thanks,

Jim