There is substantial performance difference between 14g and 18g cartridges.
292 vs 400? pellets.
American skeet rules limit payload to 1/2 oz. So, 2 1/2" hulls at 1250-1300 lobbing out 292 #9's most of the time.
Unregistered shoots don't seem to care, so, unless you are shooting for money, and they check such things, go big or go home, and shoot 3/4oz stuffed in 3" brass cases.
Impress everybody with the ink balls. Maybe win a hat.
When I shoot 11/16 oz 7.5's at 1250, I increase my percentages by just about the same percentage as the payload increase. Uncanny.
But if I go up to the 1 oz 20ga, I don't shoot 100% better. So, for me, payload has a point of diminishing returns on the clays course in small bore.
Ultimately, it's aiming error, not payload, for me.
.410 is great for upping your game, because it magnifies deficiencies in your pre-shot routine, concentration, and consistency.
I'm glad you are having fun with the .410.