What's the intended use? I've been shooting an 1851 clone since 1986 in cowboy action events. Someone suggested getting a .44 cal. 1858 Remington to have more clang on the steel targets and they didn't have the problems the open top 1851 has with sucking caps. Well... the 1858 was uncomfortable to hold in a two handed grip, the hammer geometry differed from my 1851 or SAAs, so... it sat in the safe until I safely disposed of it in a trade. Good riddance! While it didn't suck caps back into the action, it often split them, causing them to double over and foul between the cylinder and recoil shield. Franken pistols come in the form of a wannabe 1851 in .44 caliber, otherwise all 1851s are .36s... Similarily, 1860s are .44s. The smaller sized, but similar looking 1861 is a .36. IMO, .44s are ungainly and overly heavy. While .36s are svelte and graceful...
On top of all that, .36s are also more economical to shoot. Less powder and small projectiles, mean you get more per lb of lead. The frugal Scotsman in me wins!