CCTV footage will assist police if there is a break in, an alarm will alert you and police something is wrong. If I were you, I would get cctv first,  then an alarm, you kinda need both these days .

I would choose both. An intrusion alarm system will notify when a "point" is breached. CCTV would capture images useful in apprehending or identifying intruders.  Personally I have both plus exterior automated lighting. It all depends on what you wish to protect and its value. As the saying goes, "you don't install a $300 lock … Read more

Both equally important go hand in hand. If you are looking for a home security then alarm system is enough. For organization's security both is important.

If you have a security system, many of them have compatible software that allows the guard to "punch in" at various locations as they are doing their rounds.  You would need to talk to your security system vendor about that.