Firstly the short-form code BRZ-240 designation is incorrect, it should be BZR-240 (БЗР-240). In full the GAU (later GRAU) index code of the projectile is 53-BZR-240 (53-БЗР-240). See highlighted Russian/Soviet 1947 manual pages below.
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The projectile to the left seems to be a 53-BR-240 (53-БР-240), the one to the right a 53-BZR-240. The 53-B-240 (53-Б-240) is very similar to the 53-BR-240, but is often show to be slightly different in design and obviously, no tracer attached to its fuze.
From the pressed-in markings I presume they are Russian-produced, then Chinese-repainted and stencilled.