Similarity between both the figures is that both have the same heights.
The difference between the two figures is that one is a cylinder and the other is a cube.
Lateral surface area of the cube = 4l2 = 4 (7 cm)2 = 196 cm2
Lateral surface area of the cylinder = 2πrh = 2 x (22/7) x (7/2) x 7 cm2 = 154 cm2
Hence, the cube has larger lateral surface area.