SinoSoldier
Colonel
Honestly, who knows?
Maybe they've decided to only do a limited MLU of the original QBZ-95 (in the form of QBZ-95-1) because they knew they were hitting a dead end with it anyway, and decided on a stop-gap before looking to do a mass replacement with a clean sheet design.
Or maybe they will continue being relatively cheap and only issuing truly modern rifles to more capable units while the rest continue working with QBZ-95s.
That said, I think the Chinese military will eventually have to move onto a more modern family of mass service rifles eventually. Whether it's going to happen sooner (where this new rifle family may come in) or later, is another question...
It seems that the PLA is still in the experimental stage, with the QBZ-95 being one of the "experiments" but with enough merit to provide their forces with a solution until they settle on a rifle. Akin to how the PLAN was experimenting with dual destroyer classes before the 052C came along. Only time and service history would determine which rifle the PLA would make long-term commitments to.
I think the receivers of the guns we're talking about are similar, I think the "different receivers" is actually just different stocks instead... Though we don't exactly have a clear first picture to see the details of the receiver itself.
However what is fairly distinctive is the handguard on the rifle on the right in that first photo, which seems to correspond very closely with the rifle in the second photo.
And I never suggested it was two variants of the same rifle competing for the same tender? The pictures we see may merely be variants of the same rifle undergoing trials, going for a single tender for a family of rifles.
Or it may even be differing test configurations for different variants of the same rifle undergoing trials.
I.e.: instead of merely being different rifles being trialled for a replacing a single type of rifle, the pictures (rifle on the right in the first picture, and the rifle in the second picture) may well be different variants and configurations of a single modular rifle type, for a tender meant to replace multiple rifle types in service, carbine, assault rifle, SAW/IAR, DMR --
That said I'm not sure if the rifle on the left in the first picture is the same as the rifle on the right in the first picture -- that may well be a different competing design, or an alternative configuration of the same rifle variant (probably assault rifle variant).
I wouldn't be surprised if there were more designs under evaluation than what have been revealed. It's also possible for the Chinese to consider upgraded QBZ-03s, CS/LR-14s, QBZ-95 Flat-tops, and possibly AR-derivatives in addition to clean-sheet designs.
I guess the two rifles will become clearer with time, as more information comes to light.