Leopard 2a7v vs 2 RI

so leopard 2 a7v is most modenr and protected leopard variant is this case the japan leopard 2 RI how have better frontal armor? is a simple 2a4 variant with armor package… for example 2 a4 have 300 mm protection but 2a5 450 mm , thermal same in game have better themal , wight ap same but 2a7v less top speed this no need to be realistic?? only litlte brain need for this an upgraded 2a4 better than most modern leopard?:D