RR
Pros:
1. Doesn’t require me to fire up BB Maps to kick start the GPS functionality.
2. Loads my run data into the website and allows me to see my speed and elevation at each point along the map.
3. Gives me feedback on distance or time traveled as I am running.
4. Quick start without having to do a lot of typing before I can start running.

Cons:
1. Minimal cost.
2. Cannot share my routes with others or find routes prepared by others (not that I really care about this feature, but Sanoodi has it).
3. Won’t allow me to pause my route if I need to stop along the way.

Sanoodi
Pros:
1. Free.
2. Social app – allows me to share my data.
3. Allows me to search for routes created by others.
4. Integrates with Flickr photos of the area.
5. Allows me to pause my route easily.

Cons:
1. Often requires me to start up BB Maps before GPS will function. Prior to finding out about this trick, I recently went running in the desert (no buildings to interrupt satellite reception) and Sanoodi was completely unable to find a satellite.
2. I have to type a name for a route before I can begin.
3. Doesn’t give me as much feedback on my runs as RR.

Summary:
Overall, Sanoodi provides more functionality for more sports and social networking. Both apps allow data uploads to their website. I’m likely to continue using both for a while, but the simplicity of Roadrunner gives it a slight edge for me. For a dedicated application to track my running, I lean towards Roadrunner and will likely pony up the $4.99 to buy it.