Zwave is a closed standard and all your components will be slightly more expensive and harder to buy.

Zigbee is much more open, plus maybe threads will become a big thing one day.

I only use zwave for legacy reasons, I've been using it since before zigbee was a thing and I still have a handful of devices on it.

IKEA is a good source of cheap zigbee components to play with.

Keep in mind more and more devices also seem to come with their own Wi-Fi internally adding to the overall noise even if you’re secluded.

From tv set top boxes, appliances, light bulbs and even cable internet modems where it’s on and the provider won’t disable it

Adding another vote on the inovelli blues. Zigbee network has been rock solid for me. Integration with homeassistant has been flawless too - could not be happier with my purchase. It also helps that the company has a great track record with transparency and working with the community to improve their product.

One detail I don’t see mentioned often is the zigbee switches are a little smaller than the zwaves, making them easier to fit into the junction box. My house is old and has very small boxes - not sure these would have fit in some places if they were any bigger!!