Can someone please explain why the 550 is much more expensive with almost identical output. I know the 550 is slightly more efficient but is it worth the few hundred more?
Also why does the 600 only have a 1 yr warranty vs the 3 year warranty on the 550. Is the extra 300$ simply for slightly better efficiency and 2 more warranty years?
Also why does the 600 only have a 1 yr warranty vs the 3 year warranty on the 550. Is the extra 300$ simply for slightly better efficiency and 2 more warranty years?
