Hello Taesung,
Russian AFV crewmen made use (apparently limited) of two-piece canvas protective garments; your photos would seem to show just the jacket, in two different models. This is entirely possible, and surely matching trousers were not always available. Russian industry suffered a great disruption with the German invasion, and supplies were not as regular as they should. Although it would seem these garments are more typical of pre-war and early war times, it is perfectly conceivable they were used while they lasted. These could be seen in other colours like slate grey or black.
This said, the first photo shows a type of collar patches which is characteristic of early war, and would not be usually seen by 1943. I would advise dispensing of these patches and leaving the collar points plain, like in the other photo.
I don't have rear view photos, but I would guess the first jacket would have the same "sahariana" style in the back as seen at the front.
By the way, the first figure wears the semi-breeches common to all branches; and the other, presumably, a protective overall, which came in several colours, blue in this case.
HTH,
Dani