So I just got a new mod today and I am fairly new to vaping and I'm having trouble with my ohms so I got famovape magma and goes up to 200 wattage with a tfv16 tank and so on my tank the coil says 0.17 ohms and when I look on my mod screen it says 0.14 ohms and so I'm just curious on why it says that if anyone can please answer me I would honestly really appreciate it!