I would like to see some grows from each, I know the quality of light is better on a plasma but till I see results I just dont trust it. Not to mention price to performance of both. Here they show around 800-1000PPF at "8in" but it looks to be a bit more than a foot. The actual usable footprint is really small. maybe a 2.5x2.5 which is the same as an LEC at least in par output.
According to what Im seeing around some people can get 1.4-1.5g/W off of LEC and thats on par with COBs...
so it really comes down to how much you want to spend and if people are happy spending well over
4 times the amount to get the same footprint as a cob setup would run them... then more power to them.
https://www.420magazine.com/forums/grow-lighting/247324-lec-315-light-emitting-ceramic-fixture.html