I'm certainly not Bill Nye the Science guy but, here's quick explanation.
The 46 on your existing helix means the initial angle your current helix starts out with is 46 degree angle. You current 46 degree angle is "steeper"than the 44 degree initial angle of SLP helix you are proposing to go to. So, the 46 degree helix will load the motor just a bit more than the 44 degree helix. Keep in mind that on mountain sleds the initial helix angle is very short lived. It loads the motor pretty hard initially with the 46 degree angle and as the motor starts to lose its bottom end power the helix angle transitions (called progressive helix) to the 38 degree helix angle for the rest of the helixes run so the engine isn't over tasked.
So, the first number is typically for a short lived duration of the secondary clutches cycle. The second number of the helix is typically smaller (but not always) to allow the clutches to backshift easier and to help the sled attain its target shift RPM. Typically the lower the second number on the helix, the easier and better the clutches backshift.
So going from 38 to 36 degrees on the second number of your helix may improve your backshift and raise your shift speed 100-200 RPM as well because the engine can spin a bit more easily.
I hope that is understandable and helps
