Hi Damon
to IceInSpace!
The two types of dob's will have the same mirror. The difference between the collapsible and tube style really comes down to portability. Depends where you'll observe from, how you'll transport your scope, how you'll store it, etc.
Do a search or have a look through some other beginners/equipment discussion threads as there's been quite a bit of discussion about the new collapsible ones.
Cheers