lkjasd: The main difference between the two sites as that Touringplans offers you crowd level and parks to visit/avoid but doesn't really tell you why. TGM takes that information and brings it one step further by providing explanations for the choices. He doesn't say, don't go on this day, he says, if you go on this day, this is what to expect and why it will be that way. So, from the information given, you are better prepared to organize your vacation.
At least, that's how I see it now that I have paid to access the information. For the $40 cost ($20 for Unofficial Guide and $18 for the tourguidemike subscription) I honestly feel that my $2000 investment will give me a more magical vacation. Whether I really needed the information is up for debate but I am a first time Disneyworld visitor so the information is probably much more useful to me than it would be to someone who's been there a few times already and understands most of the processes that take place (how to use Magical Express, what the check-in involves, what the different rides offer, the touring plans and more in-depth coverage of each rides and the crowd level tendencies for them, etc..). I really just feel that it's like an encyclopedia of Disneyworld and it is really helping me to prepare for my vacation.
Still, it's not necessarily for everyone but with the money-back guarantee, I didn't think there was much of a risk. If after a few hours I didn't like the information given, I ask for a refund but once I saw the information, I had no doubt that I wouldn't be looking for one. Hopefully others feel the same way.