Is Samsung Mobile After Sale Service better than others?

I'm liking the Motorola G45. 8GB RAM, 16 MP Front camera in 12k. But getting mixed reviews from people on Moto G45. Some says there was a dot on the screen, but service center refused to change, and some says it has heating issues. Also, some verified purchase reviews on Amazon makes me double think. :/ To be sure, I called up service center in my locality and I said there's a G45 and it has green line issues and screen goes random off and on. Will we get instant replacement? They said they don't have parts and will take 3 to 4 days minimum. There are only 2 service centers in my city. Should I just go ahead and get the Galaxy M15 5G Prime 6 GB Variant? I need it to support Android 15 and not lag and be smooth. For daily casual use and no gaming. Budget is around 13.5 k (including charger if I get Samsung). Have to decide between Motorola, Galaxy M15 5g and Galaxy F15 in that range. No poco, iquu, realme or any other.