I’ve done a couple of cross continent moves now with movers moving my stuff, and most things were fine - drives if they’re powered down are generally safe. The only thing that has happened is my graphics card power cable had worked itself loose and the card burned out because of it. CPU fans, hard drives, power supplies were all fine.
I’d say after you get to your destination check all the things - especially cables would have saved me a 1080 (it worked for over a year so it really wasn’t obvious from a visual inspection).
Matter devices should be able to use your current wifi if that’s their network. Otherwise it would use thread similar to Zigbee. I’ve only looked at the ZBT2 as a thread router for connectivity to home assistant so I don’t have a lot of experience here yet with thread but I’ve been using Zigbee for years. Yes thread or Zigbee can interfere with 2.4ghz wifi as they’re in the same band, but my experience is the opposite: wifi has a bigger effect on them then they do on wifi. Zigbee and thread are designed for low power devices so they’re easy to drown out.
I don’t know if there’s a feature difference but I don’t think there should be. I’ve used matter devices on my wifi with no issues and didn’t need a separate router, and when I pick up a thread device I’ll use a zbt2 as the hub.