You can not compare the free and paid versions .-)). But if they were all paid to Kaspersky.Kaspersky BB + best behavior firewall.ESS very light on system and well-malware signature (hips still in its infancy) .Qihoo a plethora of engine well zero day and signature but false alarms (free + sandbox).
quite rightly, that you can not compare the paid versions of the free because it is a completely different specificity of action of the program and besides everyone chooses The protection program in its sole discretion, possibilities of your equipment and knowledge that he has.
of course you can read different opinions on these programs, but you need to test the program yourself.