Jason, I am not finding any difference in the two. Since the forum members here are not Buds employees or have access to their inventory, maybe Buds can answer this directly at LiveChat (available from 9AM to 9PM 7 days a week), the "Blue chat now" button at the bottom right of the page, or phoning at (859) 368-0371 (available 9AM to 9PM EST Monday through Friday).

5722 is stainless with black stock Caliber : .50
Finish/Stock : Stainless Steel/Black Stock
Barrel Length : 28"
Breech Plug : Speed Breech XT
Capacity : Single Shot
Length of Pull : 14"
Overall Length : 42.5"
Weight : 8.25 lbs.
Rate of Twist : 1:28
Ignition : 209 Primer
Sights : ADJ. F.O.
Model # : 28205722 5744 is weather shield finish with black stock Encore Pro Hunter XT
Caliber : .50
Finish/Stock : Weather Shield/Black FlexTech Stock
Barrel Length : 28"
Breech Plug : Speed Breech XT
Capacity : Single Shot
Length of Pull : 14"
Overall Length : 42.5"
Weight : 8.25 lbs.
Rate of Twist : 1:28
Ignition : 209 Primer
Sights : ADJ. F.O.
Model # : 28205744