Well, I learned a few things in the process of getting a consistent trigger across all of my M&Ps.
First, Apex only recommends using the Heavy Duty purple sear spring with the M2.0 DCAEK. They don’t recommend using lighter weight sear springs and clearly stated that spring chart is only for the FSS kit. The explanation given to me was the sear design for the DCAEK is only meant to work with the heavy duty spring. So, I’m not able to reduce trigger weight with a lighter sear spring. They also refused to sell me the other sear springs.
Second, Smith&Wesson is still using the unmarked striker for some LE guns and I apparently have one. They would not replace the striker with a “10•” one and said the only way to reduce the trigger weight was to send it to their Performance Center to make modifications.
I ended up ordering spare M2.0 striker assemblies from Midwest Gunworks and expect that should make all three of my M&Ps triggers feel pretty much the same.