I've been blessed with two bats destined for pro's but reallocated to my untalented hands.
The first was a Newbery. It looks non-descript, feels no different, but pings, well it pings like nothing I've ever seen.
The latest, and current match bat, is a H4L. Matt let me rummage through his stash and hand pick a raw cleft last year. I came away with a bat which is way too good for me. In my hands it looks OK, but I lent it to our best batter and he sent the ball miles. SO impressed, he ordered an exact copy from Matt.
Are they different? Yes.
Do they go better? Yes.
Do they make us feel good? Of course!
Do they make us better? Nope.
In short, some people will always want the best, but I'll take any bat which works, regardless of grade.