Agree with all said. The 800, best as I can tell having used both, is simply louder and grittier with the drive engaged. The 350 was plenty loud for me, especially at 4 ohms. Can't imagine how loud with 3 cabs. But now that I'm playing with a very loud band, I can tell that the 800 will not break a sweat whereas the 350 might have struggled a bit to keep up. Learning curve going from the 350 to 800 was zero.