• samsung budget workphone: battery usage doesnt change much, but the phone itself is a lot more responsive and lot faster
• motorola after debloat becomes faster, but some gesture features and customisation craps itself overtime
• xiaomi phone debloat is the best so far. faster, better battery usage, no ads.

as for nothing, i wouldnt trust them since they have an ai social media ai button specificly, and the ceo makes horrible comparison videos on youtube. the xda forum wont have a preferred brand, they love their poco x3 just as the newest pixel. i dont think they would specificly shit on nothing.