How are you comparing hashrate? They have two completely different PoW algos. That's like saying 20 centimeters is longer than 5 feet because it has the bigger number.

Not sure what makes you think Monero is less decentralized by nodes. Monero is only a fraction of a percent of Bitcoins size, yet it has similar node count to Bitcoin.

https://monero.fail/map
https://bitnodes.io/