Maxx does seem a bit more durable than the radial varieties. It's a bit more crush resistant. However Crushing mostly occurs during transport and putting the sail up and down so if your careful it doesn't matter.

The thing i like about maxx is that it seems a bit easier to trim. If your sailing a boat where the helm trims the main it makes life a bit easier.

There is another cloth called Flex which is also worth looking at. I expect it to be much the same.