Personally each time I draw my fursona, I keep changing him one way or another. By drawing him it might help you come to understand how you want your fursona to look, what you might not like, and it might even give you inspiration as to what you can change in order to make you like your fursona more. (So in this case I'd say go with lineart, it takes a quite an amount of time to draw them each time, might as well save some of that time by using lineart... Don't forget to credit lineart though
.) (However I will suggest making your own from scratch at one point. You'll find that you might like your fursona to look a certain way, that the lineart will not adhere to. )