John,
While they will both work the bigger the hoe the faster job will get done. What I have found is the BH can move the machine around easily so the larger the machine the more force you will have. The important thing about the curling or bucket force is you can leverage those LBS without dragging the tractor around.
Also you might want to try an old trick - carefully though. That is to dig around the base of the tree (before felling it) cutting some of the roots on one side then pushing it over. The tree can put a lot more force on the roots than the hoe and it's faster - but be careful.
Also depending on the soil - rocks and such as they make stump removal here in the Granite state interesting and a challenge sometimes.
Carl