I claim that whoever said there is 18 seconds difference is wrong. All those shots are production photos that can be found in The film and the legend book. Even you can see the attempt to hide the spine in the book in the last shot. Dracula has always been the same on all formats nothing has been added to the theatrical cut. The images can be found on pg 55,62,63,100,121 and 132&133
The page is normally extremely reliable and very pernickety regarding shortened versions. So I trust them more than your claim. They also admit, that the pictures where not taken with a capture card, but as photos from the television.