First, here is the amount of data you get for each test.
This is the results and recommendations from ATI.
This is what you get from Triton. The actual lab is the three papers on the left. Everything else is the help tab and the dose tab printed out.
Triton costs a little more and you get a lot more information as you can see. For me, I found the Triton a bit hard to read. They basically use periodic table abbreviations for their main analysis and, well, I didn't study that hard in school and had to do additional googling to read theirs.
They do not give you an alkalinity or salinity result. Although sodium is tested, it's not graded as a salinity reading we would recognize. Maybe it's in there and I can't find it.
ATI spells out each element which makes it a lot easier for me, as a hobbiest, to read. Alkalinity and Salinity are tested and put at the top of the page.
Both of them use a red, yellow green type of indicator to show deficiencies measured. As Mr. Farley stated earlier, each one sets their own standards. I would assume from the information you give about your tank. I found ATI to be closer to the parameters that I shoot for based on my reading on R2R and also Red Sea's set point for ulns system.