The choice depends upon the power source you have available. If you
are at home getting power from the power grid (power from the local
power company), the 110V bulb is the best choice. 110V bulbs don't
require a transformer to convert from 110 to 12 volts and heavier
wire to minimize voltage drop. Your home is already wired for 110V
devices.

If you are in your RV and power is supplied by a 12 volt battery, you
would need an expensive inverter to provide 110V. There is loss in
the inverter, and available power is limited as compared to your
home. Your RV is probably wired for 12V lighting, and it's tough
making wiring changes is much of your RV.

It's easier and cheaper to use light bulbs that use the voltage
provided by your power source.

If you are planning to live off the grid (providing all power
yourself), there are many things to consider. It's probably best to
get a book on this subject to understand the tradeoffs.