Configurate Repetier Host Firmware for a Solidoodle 3 witch RADDS Board

Hello,
wanted to update my Solidoodle 3 Printer with a E3D Extruder and a RADDS Motherboard. 
Now I'm configurating the Firmware but I dont understand wich type of printer this is.
I dont understand the difference between:
- cartesian printer
- z axis + xy H-gantry/core XY (x_motor= x+y, y_motor= x-y)
- z axis + xy H-gantry/core XY (x_motor= x+y, y_motor= x-y)

I also dont understand the difference between EEPROM Set 1 & 2.

I hope you can help me.
xDESTINYx
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