You can always pay extra, even on your 30yr and have it work out about the same as a 15yr.
For me, I’d look at the total amount of interest paid and see if the difference seems worth it. Make sure you compare the 15yr with the accelerated 30yr.
Paying off your house is not the way to make your money grow the fastest. If that’s your goal, listen to other people. I, personally, would rather be debt free first.