In the end I guess I would go (in addition to redundancy) with the organization that was smaller with hopefully more expertise. I feel more confident with the smarter people being able to solve the problem and the smaller people having the motivation to deal with something and not have the personal aggravation of something not working. In a large organization it's easy to hide behind someone else or make excuses.

Ultimately better to have a person or two that will pick up their cell phone when they are in the mall on a Saturday or out for dinner but are quite willing to tackle the problem when they arrive home. Not because they have to but because they care about what they do and have a conscience.