I'm looking at the Everlast PowerPlasma 50 but it is the only one that has the Blowback start instead of HF. Why?

I had a blue TIG machine that was a lift arc start, hated it. I now have a 250EX and Love the HF start. This is my only experience with HF start but I like it and wouldn't want it any other way. Why wouldn't I want HF start for my Plasma? Seems it would be easier to start and maybe better on the cutting tips?