Yes, the carrier has the longitudinal groves machined in it that engage the ears. I'm not sure I quite understand what you are saying, but I'll add this:

As shown in the manual, the differential has a total of 12 slip interfaces (6 per side). In the one I took apart, there are a total of only 8 slip interfaces. Thus, I would expect about 1/3 less torque transfer with this arrangement. (As shown in the manual, the spring DISKS have slip on both sides of them. With spring PLATES in place of the spring disks, there is no slip on any of the faces of the spring plates. However, in both situations, there is slip on the 8 faces of the 4 friction disks.)