I am refrain to comment on Blaze advisor however I did some research over the internet
Blaze Advisor is decision rules management system, maximizing control over high-volume operational decisions. Blaze Advisor provides companies with a scalable solution that delivers unprecedented agility and actionability for smarter business decisions
Decision Management functionality is delivered through the combination of Decision Management rules sets and the Decision Management service layer for adaptive decisioning and business monitoring .
you can have a look into below article for information.
Thank you Arun for your response and input! I kind of have an idea that Blaze is faster which we can try to match through parallel processing with batch and multiple servers but the real question is - whether DSM has inbuilt capabilities to evaluate rules using various Object/Data models(I think you know what I mean - i.e.Object model in terms of blaze)