PC's are much better, esspecially security wise
I have used both windows PC's, and mac's in the past and found that even a free antivirus installed on a windows PC is better than a mac OS, even with their own security systems. Their security systems are still identifying viruses by their name, size, icon, etc. Where windows and any security systems mainly built for windows uses MD5 signature identification. MD5 hashes are like fingerprints for programs, and cannot be hidden, changed, or misused in any way or form. This means the identifying, and deleting of the viruses is 100% effective and 120% more effective than a mac's security. I have tried and vigorously tested both and the PC is better. :D