This is an interesting and informative thread. It got me to using RDA's again as I had been on an RTA fad lately. Have ordered Petri 1.5 and Origen V3 clones based on what I have learned here.
The talk about most flavor/clouds prompted me to look at/test the ones I already have. And I'm starting to realize that they are all good, and very close on the final, subjective, determination of what is the best for flavor or clouds or a combination thereof. I dusted off and built (dual SS 24g) an old Tobh clone, and I think that on a blind vape test I would be hard pressed to differentiate it from the others, with the exception of air flow, and that could standardized with same drip tip and air opening settings. Or if you have a drill motor and some good bits, or a dremel you could modify the air holes to suit your preference.
It seems that the most enthusiastic, vociferous and polarized opinions come from those who paid full pop for an authentic. I understand, buyers remorse can be bad when you realize that you paid ten times what they can be had for.
Speaking of price, of the 7 RDA's I have (or ones on the way), typical price/msrp would come out to $542. The clones have set me back $62. Granted, the authentics are of better quality, but they all have basically the same amount of material and machining involved. And ultimately function similarly enough that if you tell me you can tell the difference, then please pass the salt 'cause I need a couple of grains....