Physical Difference between PCIe and EPS

Link: https://superuser.com/questions/849265/is-there-a-difference-between-8-pin-eps12v-and-pci-e-connectors

They may look kinda the same but they are completely different.

Top left connector on the EPS 12V is squared off

PCIe is rounded off in the image

More Info:
https://electronics.stackexchange.com/questions/465726/what-are-sense-pins-in-8-pin-pci-express-power-plug

https://www.overclock.net/threads/gpu-and-cpu-power-connections.1773088/