Hi Captain, many years ago when I first purchased 18XX vintage replicas, my first choice were the Colts. There isn't a more beautiful revolver ever made than the Colts. Right or wrong, the Army's adoption of the 1860 Colt will always have it the preferred revolver. For practical shooting, the Remington 1858 is exceptional. Having said that, I have 5 1858 Remingtons and 6 Colt revolvers all purchased in the last few years.
IMO a serious replica cap and ball revolver shooter will own both.
Regards,
Richard