The Clip Studio desktop software currently has a week-long 50% sale on both versions.
Here’s the best itemised guide which briefly explains what the EX version has for comics makers. Basically it’s: batch import; multipage comics with Kindle and ePub output; and rather basic-looking vector lineart can be made from imported 3D architectural and similar models.
The latter can later be made to look a bit more artistic, by changing the vector line style, but the effect is not great and the software is basically assuming you’re going to be over-inking by hand.
Clip Studio doesn’t export .SWF, so can’t be used via that format for making drag-and-drop vector props for Reallusion’s Cartoon Animator.
If all you want to do is make non-manga comics, then Clip Studio is basically the wrong software, being over-complicated and fiddly as hell. You should just be using the vastly easier Comic Life 3 instead.