OK...first of all, a point many people are confused on, is the 'verify' option.
All it does is verify the readability of the data just burned - it does NOT do a comparison of the HD data and the newly burned DVD data. And if the verify is OK, which it usually is, as one usually uses the drive that just burned the disc, that info is only valid for the drive the disc was burned in...NO others.
Which means that a disc burned on your computer, verified, etc., may not play back in your player or anywhere else, and the only way of telling is by doing what you have no time for.
Re the VSO engine - it appears to be buggy after its recent updates, and many are having problems with it. Imgburn isn't buggy - that's why it works and the VSO, for many, doesn't.
Hope this helps.