Mr. rajvinder
"dedicated" surround speakers typically refer to those models that use a dipolar or bipolar design that diffuses the sound in order to keep them from sounding localized. But the difference between them won't be day and night.
Both of these programs were aimed at mimicking the theatrical speaker arrangement, with arrays of speakers along the wall, as much as possible by creating a placeless null sound at the point source.
IMO, you're much better off using direct-firing speakers in the surround channels, and optimizing the sound by properly positioning the speakers (following Dolby's guidelines of pointing the surround speakers directly at one another and raising them above ear level). Because of how soundtracks are mixed, with some ambient cues still in the surround channels, you don't still don't want the speakers to act too much as a point source. OTOH, you also want the alignment to create the directional imaging cues that a 5.1 soundtrack (purposed for home theater use) will create.
Generally, you will want the surround speakers positioned higher than ear level, so bookshelf speakers give you the most flexibility for optimizing the alignment and height.
Hope this helps.