Boost for boost the whipple should make more only because it moves more cfm not because it's more efficient then a centri. The whipple requires more power to turn.
The jms is definitely a upgrade. They all do basically the same thing but having a constant high Voltage would decrease the life of the pump. So being able to control the voltage like the jms is a plus imo
Well if your not running a standalone Edu then your cam angles should be like everyone else to my understanding. I think your tuner played it safe and didn't push the ignition.
I used them in the past on other platforms. I used the 24x12x4.5 core and didn't have any problems. And there intercooler pipes are good quality also and welds really nice.