I don't know as I have not used the A1RMs (manufacturer descriptions are similar)

However, these are the best pads I have used (although I have limited experience). They can be a little squeaky as a daily but I think you will struggle to find a bad review of the 2500s (performance wise). If you want something more track focused I know some guys even daily the 3000s (Ferodo says 3000s are not for street use).