I don't see why that matters. If you know a Tor/Onion address then you know it, if you know an I2P address the you know it. They are both keys and they don't translate to another address.

There are other tangible differences though, anonymity and latency aside, in how software actually interacts with these networks.

Tor: TCP only, used via software SOCKS proxy support.

I2P: Software is expected to be integrated specifically with I2P.

CJDNS/Yggdrasil: Sets up a VPN interface with access to an internal IPv6 network. Both TCP and UDP supported, software needs no integrations, only IPv6 support.

Bitcoin supports all four, and the reason there are special cases for CJDNS and Yggdrasil even though I said it's not needed, are that Bitcoin Core cares specifically about separating different networks and for gossiping about other nodes.

based

bitcoin

Yggdrasil: End-to-end encrypted IPV6 routing network

satup

well, it’s true that the software(
or module) is prerequisite, there’s one advantage that Ygg would win:  the IPv6 address is derived from public key which is coherent with every node. You know the public key, the same time you got IP to route so to speak. 