No, not really. I just assumed that giving users an ability to easily specify different styles for table and image captions is a good thing, not that I see immediate use for it, but you never know. More customization possibilities with little to no drawbacks (except for a little more code) is generally preferable IMO.
John MacFarlane:
Personally, I don't see a problem with just using the Caption
style for both kinds of captions (table and image). Is
there a strong reason to use different styles?