Either should work. You can compare with your OEM size on this site:
https://www.wheel-size.com/calc/
That said, I'm using 285/35/19 and 305/35/19. Not many options available in this size. I went with Nitto NT555 G2.The 35 in the back was less of an overall diameter deviation from my LT1's stock 245/40/20 compared to a 30 tire.