[UAE] How much does the processor matter?

[runequester]

I haven't tested this much, but how much does UAE emulate the various processor speeds and how accurately?
 
In other words, how much of a difference does it make for emulation, between selecting a 68020 or 68040 f.x. other than some compatibility issues ?

[runequester]

Speed is relative to the host processor. If you let it, UAE will run as quickly as the host processor allows. You can throttle various aspects of the emulation by enforcing chipset timing or cycle exact emulation.

Would it be possible to tweak it to match an actual 68030 f.x., or does UAE just match the instructions and whatnot for those processors ?
 
Sorry if these are dumb questions

[runequester]

Gotcha. Thanks guys.
 
I was less concerned with overall speed, and more interested in seeing how certain games would run with certain processors, but I guess that might not work well under emulation.
 
EDIT: Also, if a game or app had specific optimizations for a given processor (f.x. Battle Isle had a 68020 option when installing), would UAE benefit from selecting that ?