MX-1000 has molybdenym disulfide in the formula, and Ultra-Film does not.
Ultra-Film uses a chemical type EP additive in a polyol ester base.
MX-1000 has the same EP add. in polyol ester, but with moly added.
Ring chains usually will not benefit greatly from a moly rich formula, although both are fine to use.
I personally use the MX-1000 on all type chains. Most street guys like Ultra-Film because it is almost clear, is very clean, and almost all of the "wet" evaporates.
MX-1000 acts the same way, but it always has the black moly look. Although, the only way you could tell if a man was using one of the other would be to look at his sprocket teeth, as the moly will build up a black/gray film on them at the tips (a good thing).
Both can be cleaned up with a clean cloth and just a wipe. No tackifiers at all.