Thanks trying to decide on one coil or two rda
I'd suggest starting with a 1.
For the difference you mentioned, performance isn't as simple as "double the coils, double the flavour". I personally prefer a thicker single coil over smaller dual coils.
But because of the resistances you'll be working with, it makes it easier to tailor builds. Because you're not halving your final resistance, makes it easier to use different wires. Generally uses less wattage, draws less amps, easier to build, easier to wick, easier to troubleshoot.
And my #1, I find the selection of great single RDAs to be a lot more plentiful and available.
Of course all of this is subjective. I'm sure some won't agree.