Nespresso machines are definitely pressurized and temp controlled. Keurig, less so.

I read something somewhere once (great source, right?) regarding Keurig temps, and they weren’t consistent or optimal. And the pressure is more like a hose with an attachment as opposed to a pressure washer.

Some K cups will empty out when you use them, too. From what I’ve run into, that’s typically the fancy flavor ones. But some are just coffee grounds that get a suboptimal water flow at suboptimal temps going through them.

Someone can correct me on what I’m remembering though.