It’s no contest.
Super , thank you for the extra info s well. I will check if I am able to order a solid core and then do some tests once it arrives. Unfortunately in my part of the world it is going to be in a couple of weeks…
I was also considering to have a look at the PZEM-004T - 10A as it already has a shunt but it seems like the L that supplies the device with power is bonded to the shunt so unless I can workout the circuit and modify it accordingly it will not work.