Do it right the first time and you don't have to do it again, even a furfag should be able to wrap their head around that.
There's nothing up with your art style, why on earth would I commission if I had reservations about the style? Or to snipe after the fact with "hurr your art actually sux btw". Your business sense though... can only rub my head at that.
I don't think you understand that as you're being paid to follow a given blueprint you don't get nearly as much freedom to do what you want outside of those given instructions as you demonstrate. If I ordered tomato soup for a starter and instead they were like "Na, I'll get you the bread-sticks instead" they'd soon be out of the job among more serious consequences. If I paid you to make an illustration of a giraffe and you instead drew a kangaroo with your reasoning being: >In an alternate universe there is a version of you who wanted this instead
you are very deeply in the wrong.
TL;DR not representing the agreed content to a reasonable degree IS most certainly scamming.