Add a poll.
Emsisoft depend on Bitdefender engine for their detection combined with their own BB and their "Network" which is basically a cloud. Very basic settings.
Kaspersky AV offers more functionality and features notably rollback of malware actions, KSN, combined with their excellent signatures.
If you go Kaspersky route, I suggest you to either use Kaspersky Free instead of Antivirus, or purchase Internet security. Antivirus version doesn't add more than Game Mode and web repetition over the Free one.
You should also try each on your system and see which works better for you before you make the purchase, both products offer 30 day free trial.