I did see some gain with the MSD on my build.
The MSD made 69.55 HP at 8100 rpm compared to 66.47 with the Dyna.
At peak the MSD made 70.29 HP compared to 68.69 with the Dyna.
The torque peaked at 51.48 with the MSD & 50.80 with the Dyna.
The MSD made more power & torque all the way to 7000 rpm and had better overrev.