The Shelly Plus products all have a built-in relay to physically disconnect the lines.

It's difficult to keep track, especially when sellers like Digitec don't manage to state the names correctly. "Plus" is a new (2nd) generation at Shelly. Meanwhile there is still "Gen. 3". "Mini" are the shrunken housing versions that are only available in the Plus version (and new Gen. 3). In my opinion, there is no such thing as a Shelly 1 PM Mini. "1" stands for 1 switching contact (relay), PM for power measurement. "Shelly Plus PM Mini" can only measure the current, "Shelly Plus 1PM Mini" also has a built-in relay.

The Plus versions can also measure the current. Both the instantaneous consumption and the total consumption.