Hi Sandy,
If there's one thing I've learned since I started diving with computers in 2002, it is that comparing various deco algorithms for no stop dives is often not a simple matter. I have dived DSAT continuously, first with an Oceanic Pro Plus 2, and then switching to my Oceanic VT3 in 2010. My first backup computer was a Cochran EMC-14. It ran a modified Haldanean, 14 compartment, adaptive algorithm that was slightly more liberal than DSAT on both 1st and repetitive dives. It made a good backup computer, but was quite difficult to use due to a coin operated button system (bridging contacts). It still works and I dive it every once in a while, just for fun. Someone gave me a Dive Rite Nitek Duo, it was simple to program and use. Unfortunately, it ran a proprietary, 9 compartment, Bulhmann ZH-L16 variant that was more conservative than PZ+ and proved of no use to me. It also still works and I have loaned it out a couple of times. When I switched to my VT3, I went to a Geo 2 backup, they run essentially identically. I bought my Dive Rite Nitex Q in 2016, with a goal of learning how Buhlmann ZH-L16C with gradient factors worked. At that time, the Q was available, totally unlocked, from Dive Gear Express, for only $400. It was a relatively inexpensive way for me to get my experience, unfortunately, now discontinued. I dived the Nitek Q for a couple hundred dives before I went back to my Geo 2 backup. I dive the Nitek Q every so often to further test what I have learned.
As you have, I have spent a fair amount of time comparing 1st dive NDLs of various computers and deco algorithms. In fact, I have spreadsheets full of values. This information is valuable but gives no information on handling of repetitive dives. One way to get this information is to dive the computers side by sides dives as I have done over the years. There is very little controlled data comparing the various deco algorithms on repetitive dives. The ScubaLab testing I cited in my previous post is one of the few sources. I have found this data quite interesting and it illustrates the phenomena I pointed out in other, prior posts, in comparing DSAT and Buhlmann.
I am very visually oriented, so took the time to graph the depth leaving NDL times for the 4 dives in the 2017 ScubaLab computer tests. Perhaps you and others will enjoy taking a look. DSAT, PZ+, 45/95, 40/85, Scubapros's 16 ADT MB, Mares RGBM, and Cressi RGBM are included. No Suunto computers were tested in 2017.
Good diving, Craig