I hate it when posts don't really respond to my question, instead trying to persuade me to do something different. I'm going to do that to you anyway. :twisted:
Without knowing all the facts of your case, you might want to reconsider your two scope choices for two reasons:
1. As noted above, for almost any muzzleloader situation, 18x and 24x is completely unnecessary. 200 yards is a long poke with an ML and even a 4x can make that shot, certainly a meat and potatoes 3-9x is fine. But if you are of the school of thought that more magnification is better even at those ranges. . .
2. I would seriously try to steer you away from "budget" high mag scopes, which is definitely what the Crossfire is (not sure about the Weaver). Lower end scopes really show their limitations at the higher magnifications. Targets become hazy, especially with less than perfect lighting conditions. I once had a 20X spotting scope that could not let me see bullet holes in paper at just 100yds. It was a cheap scope and was basically useless.
The Crossfire will set you back at least $220. You would be far, far better served picking up a Vortex 2-8x32 Diamondback HP for about the same price. Much better glass, much, MUCH better eye relief (VERY important in a ML). Even without the higher magnification, you will be able to see your target better. IMO, for your money, clarity beats magnification every time.