Im either buying a bayou classic sq14 or a sp10 burner but one has an adjustable regulator (sq14) and the other one has a preset regulator(sp10) what does this mean exactly and are there pros and cons of each and one is 10 psi and the other is 20 psi what does that mean also?please help im new at this and want to learn as much as i can before i make a decision on which one to buy thanx in advance for info