As I've said in the other post:
"Imitation is the greatest form of flattery"
I'm not supporting Ionics, though why even try and get a logo close to theirs if it's not the intention to be perceived as being the same?
How many of us clean windows standing like the ionics man? There are plenty of other designs people can make up to show what they are doing, why copy someone elses.
I think one of the best is actually getting a big photo of yourself on one of your prestige jobs, WFPing the windows and stick that on the side of your van, several carpet cleaners on here do it.