Setup
Copy trading is often simpler because the user selects a strategy and allocation. An EA usually requires software installation, platform setup and potentially a VPS.
Control
An EA can provide direct control over settings, broker and position sizing. Copy trading depends more on the source strategy and the platform's allocation rules.
Execution
An EA sends orders directly from the account where it runs. Copy trading can introduce timing differences between source and follower accounts, creating additional slippage.
Transparency
Copy platforms may show historical source performance, while an EA seller may provide backtests or live account records. Neither format guarantees strong evidence; verify what is actually live.
Costs
EAs may involve licences and VPS costs. Copy trading can involve subscriptions, spreads or performance fees. Compare total net cost.
Which is better?
Choose based on the evidence and structure you can understand. Users wanting more control may prefer an EA; users prioritising simplicity may prefer copy trading.