It's not about how you provide heat it's about providing proper temperatures, some people do not used UTH or lamp at all they just keep their room warmer when they have a dedicated snake room and a lot of animals.
Sp what is the difference? Some heat methods are more efficient than others (obviously heat goes up)
Your goal if you provide a temp gradient is to have a hot spot of at least 86/88 if not your BP may stop feeding and get stressed.