Difference between using relay alone or relay module - General

I'm using and arduino nano to control computer fans at 12v using a relay module, the circuit is working fine. But I also need to control some other things and there are too much cables now, so I'm designing a pcb to make a cleaner circuit. It seems easier to add the relay alone to the pcb and not the ones that comes already in a board. Is there any risk or disavantage when using the relay alone ?? Thanks

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