The N is definitely not as user friendly as the 51...I don't think the extra ammo is considerable as a user-friendly feature, unless said user manages to dump the ammo on targets early on in the flight...
These are arguably, the two biggest characteristics to note. Yes, the P-47N has superior firepower over the Pony. Yes, the P-47N is more durable. Yes, the P-47N is practically as fast on the deck. Yes, the P-47N can outturn a P-51D. All of these characteristics should carry a caveat that, for the average MA pilot, the P-47N is a more difficult aircraft to fly. Firepower is only good if the bad guy is in front of you. Durability with a bad guy 400 out on your six doesn't count for much. The Jug doesn't have enough speed to purely outrun a Pony. The turning difference is fairly inconsequential for the average pilot.
Moot in a Ta-152 makes the Ta-152 a 5 ENY plane. Wolfala in a P-47N makes the Jug a 5 ENY plane. SkatSr in a P-51D makes the Pony a 5 ENY plane. You get the point. Joe Average in either a Ta-152 or P-47N makes those aircraft just average. Joe Average in a P-51D keeps the Pony an 8 ENY plane.
The last point I'll make is that Lusche's stats, while I believe ultimately are very valuable for comparisons, sort of pull up short for this one, since the Ta-152 is rarely used for air-to-ground, while the P-51D probably carries 30-40% air-to-ground sorties, and the Jug N easily carries over half air-to-ground sorties. If there was a way to isolate the air-to-air only use of each, I think the comparisons would be very illuminating.