Is Tezos a competitor to Ethereum?

Could you please elaborate on whether Tezos stands as a contender to Ethereum in the realm of cryptocurrencies? How does Tezos's unique governance model and on-chain upgrading mechanism differ from Ethereum's approach? Additionally, what are the key features or advantages of Tezos that make it a potential challenger to Ethereum's dominance in the crypto ecosystem? Furthermore, how does the community's perception of Tezos compare to that of Ethereum, and what are the potential obstacles or challenges Tezos might face in becoming a serious contender?