I seriously Googled a LuLong because of this, lol.
OT: It's neither. If you look closely at the inner sides of both the edges of the corner and the cubicle, you can see that the tracks are different. The tracks on the side of the edges are closer to the torpedoes of the ChiLong, and the corner has a triangle looking track thingy. This minor adjustment may cause some major change in the feel of the cube just like the SuLong-ChiLong. . My best guess is that the YuLong will have less friction because of less contact due to its design. However, don't take my word for it because I never tried the Yulong before. I don't think it's a complete waste of time to try the YuLong, and many people have said that sticker-less versions are better.