Re: bus comparison, bluebirds.
There will always be some places you can't go, but both of those buses would turn on a dime compared to most other skoolies. The 25 footer has a shorter wheelbase than a full-size van. Even the 33 footer will be much more maneuverable than the average bus. However, the shorter the wheelbase, the more you'll feel the bumps.
Verify that they have the same engine, and maintenance will be the same. 100k miles is nothing for a bus if it's been taken care of. Fuel economy will be a little better on the shorter bus, but the extra length doesn't add a whole lot of weight.