Are PCIe power cables different if they are labeled type 3 or type 4?

[frank3422]

So I bought a new graphics card and it turns out it needs 3 PCIe power cables and I only have 2, because I somehow lost the extras that came with the power supply. I pulled a power cable out of an older system but it says type 3 instead of type 4 on the connector. However the pins look exactly the same so I thought maybe since it's just for power delivery it wouldn't matter.

Thanks