Yeah there are two totally separate stablecoin markets.

USDT on Tron is the utility one for savings/payments in inflation-ravaged areas.

Both USDT and USDC on Ethereum is the speculation one used for unit of account in offshore exchanges, leverage/liquidity pools, etc. Mainly for large traders who don’t care about the higher fees and are riding on the remaining liquidity network effects and momentum of the Ethereum ecosystem.