While I don't have a Class-A, other than the length, I'm not sure if any one system is significantly better than another. As long as the system you buy can handle the total number of tires on your coach + toad AND is rated for your tire pressure. Warranty length and service may be the only meaningful difference between some units. I have done what I think is the only direct real-life comparison of internal vs external system back in 2018 and published the results on my blog. But some g