I haven't seen any videos or comparisons for size and weight of P Series gas block and piston vs Superlative Arms kit.

Does anyone have both and confirm measurements?

They have very similar height dimensions. The superlative is a bit longer. Adams arms kits use the barrel nut as a way to stablize the op rod. See the rail thread for more information.

I originally had a AA kit but switched to superlative

I have an AA XRP. I also have Superlative Arms.  Sup Arms kit is better than XRP. It's also much lighter. I'm wondering if the P series adjustavlr is heavier or lighter than the Sup Arms. I also wanted to know if itis thicker, or has more or less clearance on the top, sides, and bottom for handguard access. I'll take a look at the thread however.

I like AA customer service because SupArms doesn't answer like they did back a while ago.

The P series is very similar to the superlative arms in dimensions. The p series is a little shorter but the overall height/thickness should be around the same.

I apologize if I wasn’t clear enough.