Does this Tuya include Zigbee devices? I don’t have any wifi based Tuya devices but it’s surprising how many generic cheap Zigbee sensors are Tuya.
Roughly 1/3 of my Zigbee devices are Tuya branded, if you buy from AliExpress it’s a strong possibility.
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.