Mate will most likely get it. I remember reading that there were a couple of phones besides P6, that was promised to get update to Emui2.0 (assuming that they bring Android 4.4 with Emui2.0, and not just emui2.0), and i remember the P2 and A199 included among it. Im not sure Mate was named but it most likely would be part of the batch to get update. Yet note that since P6 is Huawei's "flagship", the P6 gets updates sooner. And since the specs are nearly same then i guess they are first waiting to get a stable release on P6 and then move it to other phones like Mate, Honor 3, D2, that all use similar chip.
Huawei Ascend P6-U06 (EMUI2.3+KitKat)