Son Son II
Ever wondered what Monster World would be like if it was arcade-length, balls difficult, and the platforming was masterful as opposed to merely passable? Then play this. Quite possibly the best PCE sidescroller
period.
Maerchen Maze
Charming as hell Alice In Wonderland-inspired platformer. As enjoyable as it is, it's admittedly lacking in replay value since the difficulty doesn't really kick in until the last couple levels, and many levels end before they can reach their full potential. Nonetheless, fun while it lasts, and definitely a marked improvement over the arcade original.
Fushigi no Yume no Alice
Boring as hell Alice In Wonderland-inspired platformer. Avoid.
Also, since it wasn't on your list, I'd like to point out that Genji Tsuushin Agedama is an underrated hucard platformer that everyone should look into. Pretty tame during the earlier levels, though you'll be forced to master that evasive roll if you hope to stand a chance late in game. Interesting weapon system where you release the fire button at precise intervals to get different attacks (though once you're at max power, you're advised to just spam the lightning shower with impunity.) Highly recommended.