I would think at first blush that there are two questions that need to be answered. First, how much will you use the planer and how deep are your pockets. Both seem as though they would have some bearing on the answer to your question.
If you expect to do quite a bit of work the three knife machine would probably be the better way to go if you can afford it, I don't know as I type this what the cost difference is.
I started out with the Dewalt 734 which was a good choice for me. The only problem that I had with it was that the rollers needed to be cleaned on aa regular basis. As I have said on this forum before, due to a tornado taking part of the roof off of my shop a couple of years ago, the 734 got ruined and was replaced with the 735 which was great improvement over the 734. I have used it for two years and have never had to clean the rollers, and the fan that blows the chips out into the intake hose of the DC is probably what contributes to the rollers staying cleaner as well doing a better job of the keeping things clean.
The only time that either machine offered to snipe was on a board over maybe 24" long and a some simple upward support on the end end of the board as it comes off of the front roller prevents any snipe. I would suggest that you spend as much as you can afford, get the best one you can afford as the extra money will pay good dividends over time. However, if you do buy the Craftsman you will probably not be terribly disappointed. I sure wish you well and would like to know which way you go and how it works out for you.
Woodworking tools are very interesting and one can get addicted to buying them. The thrill of seeing the BBT arrive in the driveway with a new toy has it's own special high, anyway that's the way it effects me, I suspect that others know what I'm talking about, we have touched on this before.