6" Craftsman ointer vs. 6" Grizzly jointer (woodworking)?

I am looking at the 6" Craftsman professional jointer and the 6" Grizzly jointer. Now there are some differences, but looking at the photo's it seems like the main component (the big cast iron parts) of each of these jointers came from the same factory or at least the same design. I would ume this is true as many things are like this. They are the same up until putting the brand labels on them. It appears that they Craftsman has a 1.5 hp motor vs. the 1hp on the Grizzly. The Grizzly has a nice movable base option though. Any thoughts or experiences on either of the brands or if you think they are pretty much the same. As a side, the final price is identical.