Allright, let's try this again.
If you change from awg42 to awg43 and keep coil size (that is the parameter that stays constant in practice) these things happen:
[*]resistance goes up because the thinner wire has more resistance per length and you also need more length to arrive at the desired coil size
[*]capacitance goes up. Capacitance is electrical charges that are "right next to each other" but separated by an insulator. Your coil windings are a capacitor. You have more winds. However, you have a different wire thickness to insulation thickness which works against building up capacitance
[*]inductance goes up because of the increased number of winds
