My teslacigs mods do read a bit different than some of my other mods, I'm inclined to think it's probably the board doing it. Since it's been totally consistent, and I've had no problems with it whatsoever, so I just accept it as the idiosyncrasy of the board.
0.2 is not outside the realm of possibility, IMO, but if it's been doing it since the beginning (its not something new) and if you've been
vaping fine, well, that might be a sign that it's okay.
I don't want to give you bad advice and really you will have to decide for yourself, whether that variance is acceptable to
you but it's not unusual for mods to offer different readings on coils, etc.
So, that's kind of what I have to say about that.
Good.
Anna