ETH - more popular and longer on the market. TRX has more signs of a ponzi, some people even call it a scam due to its semi-centralized structure. ETH on the other hand is decentralized.

While Vitalik is a weird genius, Justin is a PR guy. He throws money around and thinks that if he spends enough money on ads they will bring back even more in revenue. I'd be afraid that one day he says fuck it and bails with all the profits.