Differences are; Grip Frame, Trigger, Hammer.
Bisley Hunter top , , , Bisley Grip Frame, Hammer, Trigger. (~279 Made)
Hunter bottom , , , Rounded Trigger gaurd, Super Blackhawk Grip frame and Hammer, std. trigger. (~603 Made)
As for throat's, Both of these shoot like tack drivers. Some have tight throats and get them open up a little. All deprnds on what you shoot and or how it shoots.
Welcome to the forum and you need to know unless you post a picture, it really didn't happen.
Nice guns, and congrats on finding one.