Neither. Progression is a terrible idea. (Score 1)

What a player wants in any game is control. Control of their player, control of a situation, control of a powerful weapon, what have you. All progression does is limit players from being able to function at their maximum potential. I see "skill-based" progression as being the exact same as "leveling up" or any other term you want to stick on doing something for the purpose of making your character be better at it. When you do something, you as a person in real life should get better at doing it. "Learning" a skill should consist of a player actually learning how to do it, what ingredients are required for a potion, what materials are required for a legendary armour, or whatever. When you attack with a sword, you as a player should learn how to more effectively handle the sword. The game shouldn't have to say, "Hey! You're better at using a sword now!" and you give more damage. When I play any game that requires leveling up, I drone on about how boring it is to level up, then there isn't much for me to do when I've fully leveled up. This system is inherently flawed because I'm not really having fun. It is extremely fun and satisfactory to be good at something. Being good at something means having the same chances as somebody else, and winning by either a hare or complete domination. It doesn't mean you've spent 3 months of your life toiling about doing something boring then being able to easily dominate somebody without trying.