What is the difference between regular marbles and Space Marbles? I cannot seem to see much of a difference on the marble side of things, but I will say that the Space Marbles blister pack is pretty keen. Sadly though, once you open it, you will probably never be able to repack it properly and will the Marble Twiki.
The marbles they have pictured on the pack are so much cooler, color-wise. I guess they did not look very spacey on the card though.