Maybe you can explain it better, as I am not doing too well with it....
Trumps lawyers submitted a 75 page brief yesterday to the Senate regarding the trial. It covers all the bases IMO. A lot to go through but the Conclusion starting on page 74 says it all.
https://www.45office.com/images/uploads/Final_Trump_Trial_Memorandum.pdf
Any two measurements. If you compare going from 5 to 3 or if you go from 3 to 5, then delta is 2 in either case. It is change. Or difference, between two measurements.