OMG! They can change this at any time, or even cancel it! Let's all freak out about this completly standard contract clause and run around like headless chickens for awhile like we did about the same clause in the GSL...
I do think it's interesting, almost ironic, that James said specifically the "adult content" clause in the GSL was a big sticking point for them, but there is the same clause in their own license. Apparently, if they weren't already Paizo, they couldn't themselves get a license to publish Pathfinder material
Differences:
Publishing after Termination
GSL: Once the license terminates, you cannot continue to publish with 4E rules.
PFRPGCL: (Dang, that's long) Once the license terminates, you can continue to publish under the OGL.
Incorporation of Monster Stats
GSL: It is still unclear if you can have the stats of a MM published monster in a product
PFRPGCL: You can have stats of a PFRPGB monster in a product
Changing the License
GSL: If the GSL changes, you must make your products fit the license.
PFRPGCL: If this license (I'm not retyping those letters) changes, your back stock and reprints of back stock do not need to be updated to the new license.
Adult Content
GSL: That currently means nothing that would qualify as NC-17 rated movies but that may change depending on what the larger corporation's whims (or public opinion, or the political landscape or, religious activists with a bug up their butt, or ...) might be someday.
PFRPGCL: Paizo pretty much defines it as nothing that would qualify as NC-17 rated movies, and they are not owned by a larger corporation, do not make products that regularly appear in Walmart, are small enough to be completely ignored by national politics, and the religious right largely never heard of them.
On that last point, let me just state that I am a Christian and am not slamming Christianity, merely pointing out the reality of some in my religion and how it may impact the license.
Logo
GSL: You get "Dungeons and Dragons" on the back cover of your product, a name that's been around for over 30 years and is widely recognized.
PFRPGCL: Pathfinder as a brand has been around for nearly 2 years. Its a very strong up and coming brand name, but ... it's not "Dungeons and Dragons" (yet).