Both have the same gun 155mm, but in terms of Armour, the G6 is unparalleled. In terms of wheeled Howitzers, it is the most armored big gun out there. The crew operates from the safety of the vehicle, instead of outside, where it is vulnerable, as can be seen by the pics I posted in my previous post.
It's shoot, and scoot capability cannot be matched by Ceaser as well. A high degree of automation means only 3 crew memebers are required to operate it. unlike the Ceaser, that requires typically 5.
The G6 holds 45 rounds ready to fire. The Ceaser 18 rounds.
The operational range of the G6 on a full tank, is 700kms, the Ceaser 600kms.
Ceaser is just a howitzer mounted on a truck, whereas the G6 Rhino, is literally a tank on wheels. It's crew operates in an enclosed NBC cabin, and does not need to expose it self.
Another advantage with the G6 being non-western is that you can use it where you want. No strings attached.
It played a critical role in supporting the LeClerc's in freeing Aden as well, and has really proven itself in Yemen as well. The Saudis are quite impressed with it's capabilities, that actually mimic it's namesake - the Rhino.
http://www.janes.com/article/53503/analysis-emirati-armoured-brigade-spearheads-aden-breakout
Here it is in Yemen:
View attachment 5720