The mighty is portable plus you can charge the battery while vaping (also works with 12v car socket).. As far as i know the mighty and the plenty and the volcano hybrid all share the same hybrid heating technology, although there may have been minor invisible improvements in later models.
I don't think it will add anything, but with the Mighty at least you won't look you try to kill yourself with a power tool every time you take a hit from the Plenty.