IBM vs Dell. My experience is two years old. Worked for a major pharma corp, doing clinical trial support and electronic submission work. Easily buying 150-200 laptops a year. Also a lot of servers. This stuff would have to be robust to survive being used by clinicians and apes like me. The servers had to survive being airlifted all over. We bought another pharma that had a contract with Dell and they gave us loads of free stuff to try and persaude us to use them as sole supplier. It was cheap feeling, flimsy, was outperformed by IBM stuff. One of my T21/22 laptops survived being used as a back protector twice when I came off my bike at speed. It's still in use to my knowledge. An eight by four flight case of racked IBM servers survived a sixteen foot drop from the back of a cargo plane. those things are tough.
Dell on the other hand, didn't survive normal use. Cases would fragment, screens died, hard drives failed, you name it. Universally hated.
YMMV