Each name brand can be a little different in terms of amounts of amylase; lipase; protease
Here's the difference. Both have the same amount of lipase, but ultrase has more amylase & protease...
Pancrease MT 20 Strength Description: 56000 units-20000 units-44000 units
Ultrase MT 20 Strength Description: 65000 units-20000 units-65000 units
They're close, but I seem to recall when plain old pancrease was discontinued, some people had issues with finding a replacement -- regular pancrease MT-__ didn't work for some and they had to find an alternative -- I believe in that case Pancreacarb was a better fit.