vaporizers do work nice but i wouldnt say it gets u more stoned of the same amount
it you smoke .1 worth of hash it is gonna have the same amount of THC in each rip n smokin with different methods will only have frctional differences as far as potency most people choose by ease of use, preference, etc.
smoking or combusting anything will destroy some THC but it really isnt a big enough deal to matter, while vaporizing doesnt destroy THC, it also doesnt allow one to inhale all the different cannabinoids so i would say it all comes down to your own personal opinion.
if u have some hash just try as many different ways as u can n figure out what you like most