ETH is quite secure, many years running the network smoothly after the ETC fork, with a team of devs who are probably among the best
The money is in ETH, as are the bigger protocols, AAVE, Uniswap, Eigenlayer etc, and of course the NFTs on ETH are huge
Personally based on performance and progress over an extended period of time I'll definitely say it's quite too early to be comparing the Ethereum network and the ton network. Of course as of a few months now because of a couple of tokens being launched on the ton network it actually seems quite promising. However I think it's still not yet time to start comparing it in general terms to Ethereum which is literally the biggest altcoin network currently.
Well to an extent though, it Ton has been quite progressive just like Ethereum was during the earliest periods of its launch. I think that's pretty much why most investors believe it has quite some potential.