It may have a different electronics setup, even if they look alike.
I wrote "identical" and identical is what I meant. Same model number (P79 - comes in two versions). Is operated on one of the two same frequencies (200KHz - which is one of the two P79 models). Same instruction manual.
If I'd wanted to write "looks
identical," I would've written "looks identical."
(See? I can do it, too