Maybe Turkey is trying to increase the number of defence companies by helping some cheaper companies. This could lead to increased defence exports and give Aselsan some much needed spare capacity.
This makes sense untill we get to the point that Aselsan opened up a new facility in Konya just to produce stabilized weapon stations.
Not only that, Aselsan developed improved E/O systems and integrated Tubitaks real time operating system. Femsan makes the servo motors and another Turkish company produces the shell in which everything sits inside.
So, there are no clear advantages. The only thing I can think of is that perhaps Canik has developed a 12.7mm MG with higher fire rate with improved corrosion resistance and perhaps is contractually married to Unidef. Thus, Aselsan has no access to it. But Navy loves it's fire rate...