He got it wrong definetaly,
GTX 750ti is around 50% to 60% the hashpower of 1050ti with similar power usage.
In ex. Equihash: 750ti = 75 sol/s 55W/ 1050ti = 140 sol/s 65W
but cryptonight is a memory algo, and the bootleneck is in the 128bit memory controller.
Both the 750ti and the 1050ti have DDR5 memory with 128bit bus. So the v7 speed is not much different with the right software and launch config.