you really cant sub out another vinegar for rice vinegar. It has a lower acidity and mild flavor.
A standard recipe is sushi vinegar would be
1/2 c rice vinegar (not seasoned rice vinegar)
1T fine sea salt
1/4c sugar
for the rice:
1 cup rice
1 1/4 cup water
1 oz sushi vinegar
rinse 3x
cook +rest 10 min
cool in a wide bowl /cut in vinegar