I'm using a Red ring 0.5 in a Nano and liking it.
Seems to wick better, handle the power just a tad better, and no off taste... for me.
But I've only been using the one so far.
An FYI... it's a NiChrome coil, only the Pink ring is SS.
If I can find the SS (rare as hen's teeth at the moment), they'll likely have the Claptons as well, figure I'll try both.