When you run MPC software as a plugin inside Ableton Live there’s easy way to change MPC Sequences.
First, put MPC plugin on MIDI track inside Live. And open MPC preferences (Edit/Preferences)
Open Preferences/Other tab and choose Program change to Sequence.
Create next Clip and set Bank to 1 and Program to 2. – it will Launch Sequence 2.
Now you are set up to easily change sequences via launching clips in Ableton Live session view. Also you can use Ableton Push or any other controller to switch clips/sequences.