When I wrote that monstrous series of posts (the "review") aside from little differences in appearance, non vaped odor, etc I essentially found ECX, WLI and XTR to all be well...the same
It took me a long time to notice that ECX def had a bit more of a 'nic taste' to it than WLI or XTR, nothing like the way I experience MFS though, for example. Also note that for some reason ECX (not the first batch, but the second two orders I got from them) seemed to yellow a bit faster than I wanted it too.
Problem is it was hot out and I was being silly with my storage, or lack thereof lol, so YMMV. Point is maybe it starts out pretty much as clean then just turns faster for some reason. It never picked up the offensive flavor that some nics get when they turn, however.
Anyway if you're happy with RTS I would *guess* that you'd be like a pig in mud with ECX. If you're unhappy with RTS you may still be happy with ECX depending on what it is you don't like about RTS.
Anyway I'm considering another bolus of ECX, but I can't decide if I want to do that or box elder...