Though TRON and Ethereum were created with a similar purpose (smart contracts) they do differ quite well in terms of development,  mining, transaction speed etc. Tron was a fork of ethereum and has been mentioned in its whitepaper. Tron and Ethereum can offer wide range of solutions to the ongoing real world problems.

Ethereum and it's ERC20 tokens can handle only 20 transactions per second. But TRON can handle around 1000 transactions let second. Higher transactions processing per second would be helpful in gambling industry whereas Ethereum slower transaction speed might be used for gaming industry where scalability is not needed much. TRON uses Delegated POS algorithm for mining the blocks whereas Ethereum will be shifting to POS sooner. Delegated POS will help us in processing larger transactions per second.

TRON has better Dapp volume but lacks in the place of a good development. There are far less developers working on TRON whereas more developers work on Ethereum keeping them more decentralized. TRON would serve as a alternative for integrating gambling with blockchain but Ethereum will help business to be integrated with Blockchain.