Do watts make a difference in the quality of a hair straightener?

I'm looking at the CHI, which uses 20 -25 watts, and the Sedu, which uses 72 watts. Does it make a difference on how many watts a straightener uses?Do watts make a difference in the quality of a hair straightener?
The higher the wattage, the hotter it gets, the better it will straighten hair. Drawback is it will use more energy.Do watts make a difference in the quality of a hair straightener?
What?...