Everyone looks for different things. Also, make sure you're comparing high-end to high-end. For example, the Travelpro Plat series does have a lifetime warranty that includes damage by airlines.

While there are many B&R fans on this forum, I'm not one of them as I think their internal shell is extremely cheap.

The Tumi Alpha is still a fantastic suitcase although people have lamented quality has gone down with outsourcing to China.

Personally, I think the last good suitcase made by Travelpro was the Plat 5/Crew 6 series as the shell was almost identical to the Tumi Alpha.

Another suitcase to consider is the top-end Victorinox as their shell is excellent and I think their warranty is also all-encompassing.