RDTA has coil(s) at top near mouth like an RDA so flavor could be comparable. Could be good if you don’t like to drip like an RDA but imo that would be the only reason since to me they’re good for only that, unless you want capacity and get one you can squonk, but then might as well be an RDA.
Maybe you’d rather squonk an RDA?
The RTA’s I mostly use are single coil. Single can be as good or better than dual, just depends on what’s being compared.
For RTA, lately I’ve been mostly using Doom X, Juggerknot MR, GT IV, Kylin Mini.