Create 2 DI tracks. One with one guitar, and one with another guitar. Follow the steps for EQ tone match, and get the EQ from one guitar to the other, and do the same thing the other way around, from guitar 2 to guitar 1.
You will get an EQ that is applied for the tone match. Create a studio EQ on the Kemper, using the EQ from guitar 1 to guitar 2, and name it whatever you want as a preset. For example, Hum2SingleEQ. Place that EQ in the stomps side (pre-side), and see how that works for you.
That's basically what the mooer pedal is doing. Creating an EQ tone match.