Every gun I picked up needed loads off the stock. I've got a 13" stock now. I had to buy a gun without ever picking up one with a stock that short. So every gun was at least 1.5" too long, some 2" and I learned to judge the difference simply from what it felt like in my hands and on my shoulder. The toes were all pointing in the wrong direction for me as well which just made it even harder.
It wasn't a direct choice. I liked shooting with the borrowed DT10 better than any other Beretta I borrowed (Onyx, Silver Pigeons, Es, Essential) or held (all of them). so I turned up at gun shops saying "I want a gun and I like the DT10". Someone did explain to me why I liked them, something to do with weight distribution IIRC, but I was open to the opinion of the professionals. They got me to try lots of guns and that was when I started to feel how different the 525 felt. It felt much more right than any Beretta. I'd liked the 425 as the best gun out of one shop's stock, and someone who had seen it suggested I compare it directly against the 525 I had also liked.
It's not like someone ever said: "Here, try this DT10 with a short stock and a nice shaped toe and compare it against this 425 which will also fit you".