Comparison between USDT and FDUSD:

USDT (Tether):

The most widely used stablecoin globally.

Backed by the US dollar, but reserves are not always transparent.

Very high liquidity and available on most trading platforms.

Used in most trading pairs around the world.

Suitable for those trading across multiple platforms outside Binance.

FDUSD (Fast Digital Dollar):

A new stablecoin backed by the US dollar with transparent audit reports.

Strong partnership with the Binance platform.

Lower trading fees, especially within Binance.

Strong liquidity within Binance, especially in new pairs.

Suitable for those who focus their trades on Binance and want better transparency and lower costs.

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Conclusion:

Use USDT if you need wide liquidity and trade across multiple platforms.

Choose FDUSD if you primarily trade on Binance and want to reduce costs with better transparency.

It is advisable to distribute your investments between them according to your strategy.