NEITHER !!!! THE FOLLY OF SUCH!!! LEAVE T.V. WESTERNS TO Hollywood!!! YOU NEED A BOTTOM FEEDER, ANYTHING ELSE IS SURE SUICIDE!!
Don't you hate that?! Some folks just can't stick with the topic, understand the curiosity of the question posed, don't have the ability to stay within proposed parameters, . . . .
I'm pretty sure the question wasn't about -is there anything better than an open top or a Remington . . . .
From what I gathered from the OPs question, which of an open top or Remington would be your choice? Nothing whatsoever about a D.A., semi auto, rocket launcher, grenade, machine gun . . .
So, hoping I'm clear about the question proposed, I'd go with -
The open top if it were a correctly "sorted" revolver and a reload wasn't paramount. With a cap post installed, I wouldn't feel under gunned. (At least for 6 shots worth.)
The Remington if a reload was paramount. An extra cylinder for sure. I'd have a carrier for the cylinder rather than just in my pocket (kinda like those that feel the need for extra mags.)
In fact, I sold my El Patron Comp (my previous "carry") and until I replace it with an "Outlaw Mule" Cattleman, my "accompanying" revolver of choice is either of my .45 Dragoons! That's what I'm most comfortable with and besides still being the most accurate revolvers I've ever owned, a S.A. is second nature to me.
Mike