They all look very different, to me - see the screenshots. All I did was choose each type, make the album, and preview it. Make sure you're clearing your browser cache when you preview, or you might not see any change.
Ah, thank you for the illustrations, that's very helpful -- now I see what the intention is for each layout.
In your album, are your source photos very different sizes? Mine are all the same, except that some are portrait and some are landscape. Now that I know what to look for, I do see some differences in the layouts in my album, but they are much more subtle than in your illustrations..
(And yes, I am clearing the browser cache.)
I very much appreciate you taking the time to build an album and post your illustrations!