The key difference is when the drawdown floor updates.
EOD Trailing Drawdown (used on EOD Challenge accounts):
The drawdown floor only updates at the end of each trading day, based on your closing balance. Intraday equity swings do not affect your drawdown level.
For example, if your account peaks at $52,000 during the session but closes at $50,500, the drawdown floor adjusts based on $50,500 only.
Intraday Trailing Drawdown (used on Sprint and Instant Funded accounts):
The drawdown floor updates in real time as your equity reaches new highs — including unrealized profits on open positions. If your equity hits $52,000 even momentarily, the drawdown floor adjusts immediately and never moves back down.