1911 10mm Fixed or variable power?

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I have been told, "Run an 18.5 recoil with a 25 mainspring and a flat bottom firing pin stop. This combination has been shown in empirical testing to result in a final slide velocity on par with a 1911 in standard form in 45 acp running 230 ball."  I already have the flat bottom FPS, got one from EGW. I wanted to come here and ask, since I know nothing about springs. Are these the right ones to get? I am guessing these are the ones I want to get and not the variable power ones, but I honestly don't know.

Recoil:
https://www.midwayusa.com/product/535991/wolff-recoil-spring-1911-government
Main:
https://www.midwayusa.com/product/157936/wolff-hammer-spring-1911-government-commander

If these are the right ones, what are the variable power springs for?

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Those are the springs I run.

Variable power springs have a couple of applications, which are not needed in a full size 1911 since there is plenty of space for a sufficiently powerful traditional spring.