I don't know, I'm not an expert or anything and it's hard to describe. With the tank, to me the vape was cooler and you got a little more of the actual taste of the juice so I agree with you about that. I didn't mind the cooler bit because I vape menthol so I sort of liked that part. With the Riva or ego without the tank I got a 'stronger' vape I guess you could say. That was my experience. A lot of people say the taste is muted with the tank.
Thanks...thats about what I'm getting also. Just need to find a better juice for the Riva to suite its characteristics.