Google up Notebookcheck 940m and then the 950m

The 940m uses DDR3 and the 950m gets a higher performance kick from DDR5.
So that alone splits these into very different machines.

Most of your links are messy smartphone views and I can't find exact models to dive into. But given the 2 GPUs I dug up my nod is the 950m will win by performance alone.