I vape only RDA's. One machined clone vs another vendor's machined clone of the same RDA original copy when compared side by side is the same difference between night and day. It's the luck of the draw as too which clone is silent (that is if your lucky to buy a silent one) and which clone tends to whistle or be more noisy. With Authentic tanks or RDA's you might cut the chance of receiving a noisy model. The advantage of buying authentic is at the least one could imagine returning it, with understanding presale,if it tests out to be noisy.
Note: I have RDA clones that are near completely silent.