I think the first thing that has to be address is something some of you touched on, what the heck is a "value line" anyway?
It wasn't that long ago, there were the big boys, PERIOD. There were no (at least not well distributed, I hadn't heard of any) clears, primers and God forbid especially paint available from anyone other than DuPont, PPG (Ditzler) S-W. Then a few came from overseas like Glasurit and the like. But that was it. It wasn't that long ago, that was it. The "aftermarket" (I assume we called them that because the big boys WERE the OEM on all domestic cars) clears and some primers popped up. Were these "value lines" because they were cheaper after all? Then with more and more compitition coming from these "aftermarket" makers like TranStar, Marson, PCL, etc. the big boys started coming out with the value lines. Some of these value line products were simply relabeled top of the line! Others were buy outs from the "aftermarket" companies and relabeled.
Fast forward to now and the line has gotten awful fuzzy between the two!
The biggest difference is the warrantee, the funny thing is, it doesn't have a hole lot to do with the products performance. Sure it does, they aren't going to lifetime warrantee lacquer primer. But a LOT of the warrantee is really simply an "insurance policy" that you pay for in the higher GP top end products.
That being said, I will say it as I always do. You are better off with a high end product just by the odds. It will likely be more user friendly and certainly as mentioned the color will be closer. Coverage, I have seen so much both ways I just don't know. I mean, I used to sell a value line that was built off the top of the line system. It used 17 toners from a 38 toner top of the line SS urethane enamel system. This reduced the color pallette to about 3500 colors from 12,000. It also took the real "clean" toners out that would be needed to make a color like Cokeacola red. However, this value line performed EXACTLY as the top of the line. We are talking one coat coverage in some colors.
And likewise, I remember an account I tried to get where he shot UPS trucks in NASON, two coats, done deal. That "top of the line" value line I had couldn't do it with that particular color.
All in all, the value lines have a lot to offer. But more importantly, there is no difference at all. It has really blown the old saying "You get what you pay for" on it's ear.
Brian