I want to know what are few advantages of Razor view engine other then its syntax over other view engines like Spark, NHaml or default aspx view engine. Also what is the performance difference between them
For some performance numbers see my blog post:
http://blogs.msdn.com/b/marcinon/archive/2011/01/17/mvc-3-performance.aspx
Razor is nominally a bit slower than aspx but in a real world application (that does database access etc) this would not be a big deal (unless you are running a really big site where you need to squeeze every bit of performance).