Are smilodons and saber-toothed tigers the same?

In Terms Of physical dimensions such as length and height the two cats are roughly the same size. When i say roughly, i mean a certain dimension of one cat is bigger and a certain dimension of the other cat is bigger. A Smilodon Populator which is the largest species of Sabre tooth tiger is taller than an Amur(Siberian) Tiger is 1.3 metres tall at the shoulders and the Smilodon populator is 1.55. However a Siberian Tiger is slightly longer than a Smilodon Populator by about 20 centimetres. The Smilodon Populator is 3.5m and the Amur (Siberian) Tiger is 3.7m. But In terms of weight the Smilodon Populator Excels. This animals weighed 575kg in exceptional specimens and the Amur Tiger is only 320 kg which is a lot of difference. Summed up A Smilodon Populator is taller, heavier and stronger where as the tiger is longer, and faster. So yes they are roughly the same size.