Alternator 172/182 cup vs non cup

[Mb21]

Can any help with why the 172/182 cup (no AC) has a lower amp alternator vs the no cup with AC?
Is it just the drive the AC and if so is there any issues with doing an AC delete and not changing the alternator to the lower amp version?

 

[colesy]

The mounting points are also different between the 2.

 

[Mb21]

Sorry forgot to mention it’s for a track car so no need / want for AC either

 

[Mb21]

Are the cup Ac delete kits able to be used if want to a an EPAS conversion (AC and PAS delete) or will I need a different kit?
Sorry for the question but all the Aust delivered cars had AC so not familiar with this lot of parts / kit