Hey Jason, The maul vs mallet debate has been going on as long as when the first leather worker discovered the woodworkers maul and found that it worked well for his needs.
I started out with a poly headed mallet, got a rawhide mallet (liked it!) And also have a weighted rawhide mallet that has disappeared temporarily ( blame that darned Puka in my shop) I also have a first generation Stohlman poly mallet, its 1 pound and the most used tapper in my shop. 1 pound is the heaviest tool I will use for stamps like basket weave and repetitive stuff like pebbling and background stamps.
I also have two 2 pound mauls, very good for strap end cutting and my makers mark, its a little tiring for use with repetitive stamps, and hard for me to get a consistent stamp impression. I have one poly maul and one rawhide maul and each one has its favored uses. The poly is hard striking, while the rawhide gives a softer hit (good for large stamps)
I have on my shopping list a 1 pound maul, preferable rawhide for doing those repetitive stamps.
If you are not getting consistent center hits do what an older woodworker taught me, use your pointer finger along the shaft of the mallet, point at the head of the mallet. Somehow this directs your hits to the center mass of the mallet. It works! Since I started using that I have not had a mis strike far enough off to glance off the tool. The maul does help a bit with this, but its still possible to do a mis strike off a maul head.
I've found lots of rawhide mallets at estate sales, but only one maul and it was a solid wood woodworkers maul. THe wood is cool but it gets eaten up by the smaller all steel tools.