One of the differences is that warned me Rangarid plate using the Wii also use another antenna is working with telemetry mavlink is that the compass is governed by a MPU6050 chip so the firmware should include this:
#ifndef CONFIG_H
#define CONFIG_H
/* Config file
* created by Samuel Brucksch
*
*/
//#define DEBUG
/* MPU6050 config
*
* If multiwii board uses an MPU6050 and compass is connected to its bypass port we need to enable this to configure the compass over the MPU6050
*
*/
#define MPU6050
I only added that without putting this in the program criuss MultiWii plate using the compass does not start many so it should put
#define MPU6050
with this working properly.
Sorry if I'm not helping much, just I speak from my limited experience