Noida builder track record: Hidden possession charges revealed

I'm based in Dubai, so can't easily check things myself. Anyone got experience with Supertech vs. ATS in Noida? Heard Supertech projects often have mad hidden charges at possession time – PLC, EDC, IDC sab kuch extra nikalta hai, is it true? ATS seems better but their resale value, 5 saal baad, is it worth it? I'm also worried about carpet area vs super area. Heard some builders cheat you on that. Also, can't do a site inspection myself, so how do I ensure the construction quality is good? Need a property manager later, so builder support after booking is crucial. Koi power of attorney ka process janta hai? Honestly not sure which builder to trust. Any real experiences would help! Hope this saves someone from a headache.