Moneropedia: add Comparison page link in I2P entry

Referencing:
 - monero-project/kovri#256
 - monero-project/monero-site#155

knowledge-base/moneropedia/i2p.md

@@ -8,7 +8,7 @@ summary: "The Invisible Internet Project: an anonymizing overlay network"
 
 ### Monero
 
-For Monero's implementation of @I2P, see @Kovri.
+For Monero's implementation of @I2P, see @Kovri. For a comparison of @I2P to [Tor](https://torproject.org/), read the [Comparison](https://geti2p.net/en/comparison/tor) page.
 
 ### The Basics