i just think that the spar varnish can look a little "plasticy" and because it is thicker it is harder to get a real good looking finish because it doesn't flwo as well. Arm-R-Seal is very very thin, almost liek water, i just barely get the tip of a foam brush wet and it will cover half a limb. since it is so thin you never have to worry about brush streaks. you do have to make sure you are only using a very smal amoutn at a time or you will get drips, but that isn't a big deal if you're careful. I do about 3-5 coats using steel wool in between coats. The gloss looks like glass when done, too shiney for hunting but great for show. I use the matte on hunting bows.