One of the most useful, and undervalued until you need it, considerations is hardware support. If they're an early stage startup, it's likely there are no appointed internal IT staff to help you out when things break. I'd imagine to most HN users troubleshooting and fixing hardware is fairly trivial but do you want to spend time doing that when you have outstanding work and a deadline?

AppleCare is frictionless. I've also had OK (but not great) on site warranty support from Dell.

IMO it's better to save your energy for your work rather than fixing your tools.