I thought Anstam was Pom Pom? All kidding aside, any more evidence besides both being anonymous projects? Stylistically, they're quite different; not that that proves anything, Traumprinz is quite versatile himself. But Pom Pom has Berlin written all over it, I always assumed it's someone from the Hardwax sphere, maybe a collective, while TP seems entirely independent, hovering above everything and everyone else. If anything, he's more Weimar than Berlin, if that makes sense (probably not). And with all due respect, Pom Pom is not quite on his level ...
Apologies if you're either one of them.