Here is what I can tell you right now, as I am in the process of relocating back to the US and my life is currently so upside down that I don't have time to think and provide the review I want to write yet:
1. The Rolock 90 system is different compared to the DGS, specifically with regard to setup and how the two halves of the system connect.
2. The outside dimensions are fairly similar with regard to ring external diameter and the amount that extends outside of the PU ring.
3. The way glove side attaches to the cuff side is very easy and intuitive to use both donning/doffing gloves pre/post dive.
4. They are much easier to get apart after a dive than the Ultima DGS. Just make a fist and twist while holding the cuff-ring with the opposite hand. There is enough friction in the system that the system will not inadvertently open during use....believe me, I tried to get these to fail in use, shy of breaking them.
5. They do take a little longer to set-up than the Ultima DGS, but you will not break your fingers trying to get the gloves mounted. Set-up is straight forward and there are a couple of really good videos on youtube that shows what to do....after setting things up the first time, I wanted to make a change and took it all apart and started from scratch, things when much quicker the second time and I like the way it works with the modification I made to how things are indexed (Rolock instructs to index the installation to the middle fingers of each hand...I decided to index to the space between my thumbs and forefingers, and if I was to set it up again I would just index to my thumbs directly)
6. What makes the Ultima DGS easier/quicker to setup is that there is no indexing. The Ultima system is agnostic to the position of the cuff ring when you press it in the PU ring, and it is agnostic to the position of the glove relative to the glove-ring when mounting the gloves. BUT I hate it when I don't get the glove side pressed straight when donning them and the sometimes slight twist in the glove when attached annoys me enough that I will pry them apart and reattach. I also find the 2nd one slightly harder to press on when wearing glove liners underneath and fully kitted up. I have upper back issues and the compression from the weight of my tank hanging on my shoulders is very uncomfortable and it can be frustrating dealing with the discomfort while dicking-around trying to my fargin gloves on or off.
THAT BEING SAID, I have not had any issues with my Ultima DGS other than the pain associated with getting gloves on the glove-rings (fixed by swapping the stock o-rings with some size 341/70 durometer ones), and the level of effort it takes to get them apart after dive.
7. Waterproof has somewhat silently addressed the pain-in-the-arse factor of the level of effort needed for pressing their system together and prying it apart by introducing the Ultima Push and Pull system. This is not a new dryglove system but instead is an add-on that is pressed into the glove-side rings of the current system. This add-on is purchased separately.
My wife and I have not tried the Push and Pull add-on because Waterproof could not explain to me how they worked. They just repeated what the product does, but had not info on how it achieves making it easier to attach/detach the 2 halves of the system. I found one SB member that has them and he could only explain that they do work well for making it easier to pry the 2 halves of the Ultima DGS apart but could not explain how either, he just said they work like magic. I as not going to spend 44 euros a set to confirm on my dime if they work or are just a gimmick, and the fact that Waterproof even introduced this product to the market highlights that they are aware that their product can be difficult for folks to don/doff which, to me, shouts inferior product...in my opinion one should not have to invest an additional 44 euros on a gadget to get the original product work well, especially when the company itself can't explain how the darn things work to do what they say they do.
I asked Waterproof to send me a set to test and review and they said they would send me a 2nd set in exchange for a review if purchased the first set. I told them that I only asked them to send me a set so I could better understand the product and that I was not looking to mooch free product...in fact I already had asked my LDS to order me one set for purchase but after Waterproof could not provide any information I called the shop and told them to hold off on the order. I want to state that I am not turned off by the Ultima DGS and can't stress enough that they work well, but since they could not tell me how the add-on works, I decided that if I was to spend more money I would purchase my wife a set of the Rolock 90 system instead. As indicated above, I like my Ultima system but the Rolock is just easier to use.
(full disclosure: Rolock sent me the set I have installed on my suit. They have not asked me to do anything with them, review or otherwise...in fact the set sat in their box on my desk since November/December timeframe as I could not dive due to covid restricitons. My view/review of their product is based on my honest impression of the system based on the limited time i have thus far been able to use them due to covid restrictions and current life events, and I would never recommend/endorse a product I was not willing to buy and use myself).
My apologies for another long-winded post.
-Z
