Ok I finally got it. Took me a while but its thanks to this thread. I know know the basic difference and I bought some oils from vaporgod. As for "weed" attachment, kinda use it like an electric pipe but its not that great.
Finally tried wax! In my vap pen. I also tried Tetra Labs Pure Gold. The original question is what do you get out of it? I got pretty medicated after just 2 hits. It was fast and effective. Good for on the run. Vaping makes me less tired and isnt as hard on my lungs as smoking.