Yeah James Kuhli Loach is better then the Clown Loach. I had two of them in my tank when I was a child, very cool. They were the best fish I ever had I think. They don't move a lot and try to hide most of the daytime at the ground. Yes that sounds odd but I don't know why, THEY ARE JUST COOL

maybe it's the way they move.
They are nightactive when I remember right. Wouldn't it be cool if when the lights of the aquarium fade to black that they start to swim around heavyly? I remember they made a lot of noise in the night, kicking gravel and stuff like that.
And James is right they are difficult to keep in a tank, since yet it wasn't possible to get baby Kuhli loaches of eggs from Kuhli loaches keept in tanks. All Kuhli Loaches available were captured from nature. Isn't that an argument to do them???
Clown loaches are cool two, maybe you can do both
Hope my arguments help you to get a decission, I would be very happy if you add Kuhli Loaches