Speed and memory
In our performance index the GeForce GTX 1660 Ti Laptop scores 12 and the GeForce GTX 1650 Super scores 10, which makes the GeForce GTX 1660 Ti Laptop about 20% faster. That is a visible but modest gap, usually 5 to 10 fps in a game that runs at 60.
The GeForce GTX 1660 Ti Laptop has 6 GB of video memory and the GeForce GTX 1650 Super has 4 GB. That difference matters at 1440p and in new games at High textures, and it can outweigh a small speed advantage as the card ages.
In our estimates for popular games at 1080p on High, the biggest gap is in Call of Duty (32 against 19 fps), and the smallest is in Fortnite (132 against 112 fps). Games that are light enough to run above 200 fps on both cards show little difference at all.