I think from Jim's post earlier, I'd say both are bad.

You see that the difference between L1 & L2 are similar for the ok Yazaki and the bad Rema.

Yazaki Plug

11.7 °C ambient temperature next to plug & inlet.

15.6 °C AC Power L1, delta T = 3.9 °C

14.5 °C AC Power L2, delta T = 2.8 °C

...

Next, the REMA plug connected to my Blink home EVSE model WE-30CIRE, S/N 101940 running at 16 Amps.

REMA Plug

5.5 °C ambient temperature next to plug & inlet.

17.5 °C AC Power L1, delta T = 12.0 °C

17.4 °C AC Power L2, delta T = 11.9 °C