As I see it, the P0h permits more positioning freedom and greater speed in the field at the expense of a bit more weight and size (and the potential for a little less absolute stability) compared to the L60 Leveler. The L60 is shorter, likely a bit more secure and stable, but more limited in use.
Picking which one suits your needs better depends upon your needs. The lack of a 90° turn on the L60 can be accommodated with an L-bracket for many cameras, and is irrelevant for square format cameras/shooting. More important that you must evaluate is its absolute range of movement and whether that is sufficient for your needs.
The L60 Leveler, and the L60 Mini Cube, both appeal to me a lot. But in all honesty, the P0h and P0 that I already have are both excellent and more than sufficient for my current uses. They're both reasonably light, small, and very convenient in use. The control paradigm for both is excellent and fluid, and I've not had any problems with stability for my gear. The P0h in particular has permitted extremely fine control of the big, heavy, long Leica SL90-280 lens for use with tabletop setups ... exactly why I bought it.
You just have to figure what you need, objectively, and then act upon that.
G