Which Of These Tyco Alarm Systems Are Good For SME, DSC Or Visonic?

can anyone recommend which of these two are more applicable for SME intruder alarm systems?

depends on what you are trying to accomplish, but as a rule DSC has always rated a bit higher (IMO) than Visonic.

DSC would have been considered better than Visonic, but if you require a wireless solution then Visonic is stronger in this area.