Furutech/Neotech design is similar in the sense that turning the screw will lower a clamp and close the hole. However, the actual design and parts are much different. You can get a much tighter and stronger clamp on the wire with the Furutech/Neotech.
Furutech FI-15 plus (R) rhodium plugs are $55 USD each (I usually order them from Hi-Fi Heavan, but you can get them multiple places).
The Neotech Gold-plated plugs are normally $80 each retail, but Sonic Craft currently sells them for $64.
Neotech Rhodium are $100 retail, but Sonic Craft sells for $80 each.
I don't know that I would say rhodium is the most "neutral" because "neutral" is so subjective to someone's opinion of what "neutral" really is. I will say that Rhodium give you the most resolution and it is very revealing ( it can be revealing of bad electronics). Gold plated is more forgiving and will give a warmer and possibly more engaging sound, but will hide flaws in electronics and hide detail in the sound.
On the other hand, only rhodium will allow you to get the most out of a very high end piece. For example, I have compared two DAC, one low cost and the a very expensive discrete high end DAC. With basic power cords / interconnects, you really could not tell any difference between the two. However, once you get in some Furutech rhodium XLR with OCC copper solid-core wire and it becomes apparent that the low cost DAC just cannot compete with the sound quality of the expensive one.
For the XLR connectors, the Xhadow XLR connectors are the only ones I know of that use screw-type clamps on the wire instead of soldered. They are well made and the screws work good. However, they are silver-plated and I don't like anything silver-plated, lol. (with the exception of Nordost HDMI and digital cables).