The core difference
An automated bot decides or executes trades according to its model or rules. In copy trading, the follower account mirrors decisions generated elsewhere. Some products combine both structures, with an automated strategy acting as the source for many follower accounts.
Control
Running your own bot can provide more control over broker, settings and position sizing. Copy trading is often easier to start, but the follower depends more heavily on the source strategy and copying infrastructure.
Transparency
Neither structure is automatically transparent. A bot may hide proprietary logic, while a copy strategy may reveal trades but not the decision process. In both cases, verifiable live performance is more useful than marketing descriptions.
Execution differences
A bot running directly on an account can still experience spread and slippage. Copy trading adds another potential source of variation because follower orders may reach the market after the source order.
Fees
Bot users may pay software, hosting or licence costs. Copy-trading structures may use subscriptions, spreads, management fees or performance fees. Compare net outcomes rather than headline returns.
Which is better?
There is no universal winner. The better structure is the one whose risks, custody, fees and performance evidence you can understand and verify.