I own(ed) 5 Brooks. 2 B17 regular and 1 B17 flyer (sprung) which I never saw why people made a big deal of breaking in.

1 Conquest which is a Pro leather top on a sprung frame. No issues breaking in and is my most comfortable Brooks.

I am currently breaking in a B17 Narrow. It is taking the longest to get comfortable, though after 500 miles is beginning to show my sit bone areas. I still wear padded shorts with this one. I have high hopes for this one.

Before my first one I finally realized 100+ years and still making the same design it must be worth a shot. Worst case is you try it for a season and if you still don't like it you can sell it for 75% of what you paid.