I’d go with the 2c because you can connect it to the home base. I’m not sure if the 2c has a built in alarm though. I know the EufyCam 2 Pros do have it.

This is how I have my setup:

AWAY: If any Entry or Motion sensor is triggered sound the homemade alarm.

Automation: If homebase alarm is triggered start recording on all cameras and sounding the alarm on all cameras.

These actions can not be done with the solo cam since it is not connected to the home base.

I find this I prefer this setup because the homebase alarm is rather weak. But the homebase alarm in conjunction with all the cameras surrounding the property going off will certainly scare an intruder away.