I have ruger,knight,T/C and savage muzzleloaders,and all will shoot 1 inch and less,the savage with either powder.So you can shoot either in the savage.I would get which ever one you are more comfortable shooting.
Not just a few but many of the fellows I talk to are shooting the smokeless in their muzzleloaders,after manufactors telling them that it is unsafe.I think they are taking unnessary chances,which I am up in years and want to hunt a few more years so I don't take that kind of chances.Point is if you have any thoughts on shooting the smokeless I would go with the Savage,you wouldn't have to worry everytime you pulled the trigger if it was going to blow up in your face.
Good luck in what ever you choose and have fun shooting.