The Radeon R9 M370X 2GB and the GeForce GT 750M 2GB GDDR5 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.
The memory bandwidth of the Radeon R9 M370X 2GB and the GeForce GT 750M 2GB GDDR5 are the same, which means the R9 M370X and the GT 750M have equal limitations when it comes to graphical data transfer.
The Radeon R9 M370X 2GB has 640 Shader Processing Units and the GeForce GT 750M 2GB GDDR5 has 384. However, the actual shader performance of the R9 M370X is 422 and the actual shader performance of the GT 750M is 406. The R9 M370X having 16 better shader performance is not particularly notable, as altogether the GT 750M performs better when taking into account other relevant data.
The Radeon R9 M370X 2GB requires 75 Watts to run and the GeForce GT 750M 2GB GDDR5 requires 50 Watts. The R9 M370X requires 25 Watts more than the GT 750M to run. The difference is not significant enough for the R9 M370X to have a noticeably larger impact on your yearly electricity bills than the GT 750M.