Better privacy, your node is visible in the network and people can see your IP address and your capacity.
Also you can easily access your node from everywhere without port forwarding and networking stuff (tough there are other solutions too like cln commando or lnd lnc)
Downside is tor is extremely unreliable and annoying to use. Sometimes it works, sometimes it doesn't. Fetching an invoice on Zeus connected to your Node via Tor can take like ~2 minutes. Also there won't happen much routing on your node due to this.