Here are one of each model of the same vehicle next to each other. In case you need to know, the BF model has the metal turret. The Zvezda is “snap together” plastic.
The Zvezda model is shorter by about 5mm but otherwise only the headlights and guns look obviously different at a glance.
I would not want to mix and match in the same platoon, but otherwise, the Zvezda offering is not without merit.
Note: these models are pictured without the wheels attached to either model. The Zvezda model has not been glued, just snap fitted for the comparison.