Nurse Eeyore????
Glad my DW hasn't heard about this. Yes, "Theme Park Edition" on beanies, etc mean you can only get it at WDW or DL.
As to more valuable, it depends on what you collect. For example, if you collect 100 Acre Woods beanies, there would probably be 4 Halloween beanies at TDS and 4 different ones at the parks. If you are geographically challenged, then getting all 8 becomes a challenge.
Nurse Eeyore, while a park plush, probably doesn't have the same higher value as a park plush that is event/holiday related, since it probably was sold for a longer period.
But as always, value is in the eye of the collector who doesn't have it and needs it.