What are the main specification differences between the GT-PRO and the GT-8?

I'm new to using multi-effects, and I'm not sure that I can program my own sounds. Does the GT-8 provide a way to get the sounds I want without much trouble?

Does the GT-8 / GT-PRO briefly mute the sound during patch changes?

Can I change the function of the GT-8's expression/control pedal when I change patches? (Example: Using the expression pedal as a volume pedal in one patch, and as a wah pedal in another patch.)

How have the GT-8’s effects been improved over those found in the GT-6?

When switching from backing to solo playing with the GT-8, can I quickly activate a volume and tone boost for my solo sound?

When I use the GT-8's Preamp/Mic Simulator, can I mix the output of channel A with channel B?

I would like to connect the GT-8 to my guitar amplifier. Can I adjust the GT-8’s sound to match the amp’s tonal characteristics?

Can I use the GT-8 with an acoustic-electric guitar?

The GT-8 has an AMP CONTROL button and an AMP jack. What can I do with them?