Hey there! Just trying to determine which version is better for me, but I'm having a hard time how this and the original mod are different. What can this version do that the original can't?

I was wondering the same thing. I did notice this on the Info tab:

• Two tick delay (original version has three tick delay)
• CompactCircuit, Picker Dollies/Even Pickier Dollies. Compatible with Space Exploration.

I don't see compatibilities listed on the original, so it seems to me that this combinator is a rewritten version of the original that features several mod compatibilities and the two-tick delay. If anyone else seeing this has more specifics I would be interested to know what they are.