In the application process, if a claim of A contains exactly the same technical features as the independent claim of B, it depends on the application types of these two patents. If both of them have applied for utility model patents, and A and B have no other substantial shortcomings, they can be authorized. If one is an invention, or both are invention patents, the corresponding claim of the invention patent with a late filing date will not be authorized because it does not possess novelty.
If both A and B are authorized, then the above question is whether the permissions of A and B are stable. If a certain claim of A contains exactly the same technical features as the independent claim of B, it depends on which patent has an earlier filing date, and the patent with a later filing date may be declared invalid by others for various reasons, such as 13. 1, or Patent Law 22.2. In the process of invalidation, the situation is more complicated, so I won't list them here.
What needs to be pointed out here is that the claims are reviewed one by one. Just because one claim has no authorized prospect does not mean that other claims have no authorized prospect.
If the claims are similar, the situation is very complicated and needs specific analysis. Similar concepts are vague and cannot give constructive answers.