300w vs 500w inverter question

BobnKris wrote:
The television in our TT is a 32" Jenson that runs on 110v only. I have both 300w and 500w inverters, and both have proven to power the tv on battery power alone.

Other than the obvious (the 500w provides more juice), is there an advantage to using a higher or lower watt inverter, given both provide the required power?

Thanks, and I hope everyone is having a great camping season!