I had a 2013 marz 55 rc3 ti v2 evo on my previous bike, and on my new bike I have a rockshox pike rct3 160mm travel solo air.
The pike is surprisingly good, better than I was expecting, and the best air sprung fork I’ve used so far, small bump sensitivity is very good for an air fork. But its not as sensitive as the marzocchi. Over big bumps I’d say they’re comparable, but the marzocchi is more ‘plush’feeling overall.
In terms of overall performance I’d say they’re quite close, with the marzocchi having the overall edge, but the marz is massively and noticably heavier than the pike, dont know if that is a factor for you.
I think if you were buying a fork now, and had to choose between marz and pike, you’d go for the pike, as its 95% of the performance for a significant weight saving, but if you already have the marz I probably wouldnt swap to a pike unless weight saving is critical.