A while ago I transitioned to just shooting the same gun (almost) every week and I do think that matters.
Over the last ~15yr I gradually gravitated to the M&P and that was my focus until I decided to try a Ruger 9mm SR1911. I continued to excel for a few years, enough that I questioned if it was because shooting a 42oz pistol with an excellent trigger was just easy or because I was getting good. So I bought a 5" M&P and didn't do anything except put nice Dawson sights on it, and I kept getting better. Then I bought another one, and did the common trigger and barrel enhancements, and it maybe made a little better, maybe. Then I bought a third one and did the trigger and barrel and direct milled for an SRO and I got significantly better.
But I am happy I am not a one trick pony that relies on specific equipment. A few months back I got to our three gun match and went to strap on my nice 5" gun with the RDO and realized I left it at home. So I shot that day with the 4" compact carry version that has nice, but rather crude TFO sights (otherwise stock), and happily did pretty well.
And I have recently been trying the Shield Plus, and have shot it in practice and last month at the annual "safe queen" three gun match. I do not shoot it nearly as well as the 5" RDO gun, but I am pretty happy with my performance with them.
So I think the one I shoot the best is the one I shoot the most, but I can do pretty well with the close cousins. I am sure if I had a bunch of Glocks or a bunch of Sigs or a bunch of 1911s or a bunch of CZs I would be saying the same thing, but sticking with the same thing, or alternatives with decent and similar grip and trigger ergonomics, and going out almost every week, has been my path to reasonable success.
ETA:
But with advanced notice and opportunity, I would be inclined to gram on of the Three Amigos