I tried a .45 Colt Single action style revolver this last time at the range so I was able to get a direct comparison between the 8 1/2" barrel on my '58 Remington firing a RB & 29 Gr of FFg & the factory loaded cartridges in the Ruger Vaquero with a 5 1/2" BBL.
The .45 Colt cartridge was a much harder, sharper kick, & recoil was noticeably more up & left than the .44 Remmy. I tried the "pinky under the grip" hold I use with the Remmmy & it was decidedly unpleasant with the .45 load, compared to the "push" of the BP load.
I'm not sure how much difference the extra barrel length made as I don't have a 5" for the BP, or an 8" for the .45 Colt.