Hard shell [Extremely Large] is a "Titan" with a carbon fibre & polycarbonate shell, very nice & highly robust, Been in service for about 15 years now & yet to accumulate any significant battle scars despite extensive use by myself & family, came courtesy of a large number of points accumulated on Etihad and seems that it would have been value for money had I spent actual money on it.
The other one is a "Jetstream", Chinese made Walmart special, hard back and sides with a ballistic nylon soft front. This was bought, purely on size, when I had bought a couple of paintings on holiday and needed something to swallow the paintings, sheet insulation board protection plus one of the bags and the contents I had used to go on holiday, so whilst it's been about the dark & scary luggage areas of airports a fair amount, it hasn't seen anything like the same amount of international use as my other options, but I have previously used it a fair bit as well for lifting & shifting costume & SFX gear to & from theatres when I used to do backstage stuff.
Both have been good servants & have many years left in them. I've been fortunate enough to be able to match what bags I needed to what type of travel I was expecting to do & if I didn't have something suitable, to be able to pick up something that was.