They are all different.
No matter which model/brand if you vaporize the herb correctly you will not smoke or combust. Some vapes are more likely to smoke or combust and some you would have to intentionally smoke or combust with.
As far as thick clouds of vapor go that's subjective too as it all comes down to technique. I've gotten big clouds off of the Magic Flight Launch Box and it's a very small vape.
What is your Dom like? He/She is very nice if they are getting you a vaporizer. Are they picking it out for you since they are the Dominant/Domme?
At times a friend of mine is a submissive/masochist and service oriented and I had him get a Magic Flight Launch box since he wanted one and I had told him all about using one.
I got this model myself since it met my needs and I'd read up on vaporizers on here and which brands are quality and which ones should be avoided.
Do some research on this site, and find out what type of vaporizer you prefer if you want one that's portable or one that's only for use in the home, or one that can be used anywhere. Price is a big factor too for lots of people I wanted a quality vaporizer that was portable, discrete, stealthy, and well made but I did not want to go broke so I got the Magic Flight Launch box since it fit all of my needs and my budget and it's gone above and beyond my expectations.
I broke up with him...
