Who's makes the best fit replacement panels

[PanelDeland]

I can only say that you will probably not find much difference in fit from company to company.Warranty and metal thickness may vary but I doubt if any co. can afford to make a panel that is already made by someone else.The cost of tooling and such is so high that there is not enough demand to warrant the tooling required to make a part already made by someone else.The exception would probably be on smaller parts.I think most aftermarket sheetmetal is made by a company overseas and may be boxed in several manufacturers packaging.Different co,s may spec different thickness of metal but I think most are stamped from the same dies.I do know there are a couple of thicknesses of inner fenders since I have actually seen/felt the difference.I also can't swear to any of this it's just from looking at lots of aftermarket sheetmetal.
The debate on fit of aftermarket panels will also continue but to be truthful,these trucks didn't have the tighter gaps most expect when they were built and will not have them without working at it.There is also the issue of "settling".In 40 years if you haven't settled a bit then someone never used you for a truck.
Now these are just my opinions but they are from personal observation and I may be judging from a different perspective than others.