I had a look in my software - set the two next to each other and there is a difference in colour; one has 2 colours (and 7 changes), the other 2.
Both look fabulous. I think the 3-colour one is the one in the pack, so I'd download the 2-colour one as well.
Also in the pack there are X's that seem to be part of the embroidery. I think they might be there to be able to line up the different designs to create the 18" swag. If you want to use a single item you need to delete that color
They are placement marks, makes stitching the complete design easier if you use exactly the same order. Can be skipped easily (or removed just as easily should you have stitched them). So i saved the picture with the stitch order, just in case.
I think in the separate ones there is one double, same stitch count (7900) and same size, # 10713811 and # 10706261.
And the last, combined one, too big to use without splitting.
OK the double threw me. But I think it's not actually a double. They are slightly different sizes and the colors are different.
I know the designs look different in colour but the pictures of the details look the same. I would have to print out the colour charts to really see the difference.