SY (Sembo) has more tanks because you could always use more military for your brick battle scene.
Each set sold separately and characters included.
SY0102 is LECLERC Main Battle Tank at 889 pieces.
SY0103 is Type 10 Main Battle Tank at 806 pieces.
SY0104 is Leopard 2A7+ Main Battle Tank at 898 pieces.
SY0105 is FV4034 Challenger2 Main Battle Tank at 904 pieces.