Some folks will never know the difference between a good barrel and a match barrel. And for many of such folks there will never be a difference.
There is a reason why an unused NOS H&H barrel will bring over $500 to a target shooter.
But before spending hard earned money for the alleged best, consider that shooting a muzzle loader accurately depends on literally dozens of factors. Sights, barrel length, lock speed, breech, loading consistency, holding consistency, eye sight, upper body conditioning, breathing, fatigue, muzzle crown, etc. There are also environmental factors such as wind, light, dampness. In the overall scheme of things, you really ought to be a very good paper target shooter before you will be good enough to even notice the difference with a match barrel.
I competed for years against folks who were much better offhand shooters. But their loading techniques from the pouch were inconsistent and I would sometimes beat them just because I could more consistently control other factors. Off the bench at 100 yds, if I watched the wind, I could usually shoot an half dollar 5 shot group with a match barrel, and in the calm, much smaller.
A poor shooter will shoot poorly with any barrel, even the finest match barrel. A sloppy crown, or sights that are too wide, automatically voids all advantage of a match barrel.
For instance look down the stock sights of a TC Renegade at a 100 yd target, and then look down the stock Buffington sights of a model 1884 Trapdoor. Note how much finer the trapdoor sights are and how much easier to aim accurately. That is just one factor to maximizing the accuracy you have in any barrel.
Lastly, what some sell as match barrels might not really be match quality. A burnished round groove barrel may cost more. It may not necessarily shoot better. H&H rifles were choked slightly at the muzzle. I think it made a difference in their accuracy. The round groove rifling was also at a much greater radius curve, geometrically, with very narrow lands. I am not aware of any current maker that makes a Pope style rifling for muzzle loaders, except perhaps Bobby Hoyt.