I would say Ben could take a force majority due to his speculated growth and that one cancer canon character guide where AotC Dooku is an 87 and AotC Kenobi a 90 in force power.
Dooku takes sabers only because he's a more active duelist during RotS era whereas Ben doesn't see as much action to practice his technical skills.
All Out I'd give it to Dooku 7-8/10