IMO, there is very little diff between 160pf & 170pf, most shooter just will not notice which is which. Personally, I find the recoil impulse of TG slightly more than WST. I thought it was me but have given my 170pf 45 loads to others to try & they feel it shoots softer. Exact same pf, just softer recoil impulse.
I like to keep it simple & shoot the same ammo for practice as a match. I have used 200, 230 & 255gr for idpa 170pf & all feel about the same running the gun at speed.

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NRA Cert. Inst. IDPA CSO