I'm sorry. The only GPS software I've tried is Solus. I didn't bother with the other programs, so I can't compare.
The Solus maps are pretty decent, but there aren't a lot of details depending on how closely you zoom in. When I get ready for my trip, I use several different views of the area, and generate several different maps at different zoom levels. Like I said earlier, a map will have 2 zoom levels automatically, but I like lots of detail so I use several maps.
I can create maps and routes with waypoints in StreetAtlas 8, and then download those maps and directions to the epods. Once the maps are created, they are pretty static. You can't do anything to it, like find an address or change your preprogrammed route.
I've used Solus on my Palm VII and my Casio Cassiopeia E105, and the 2 versions are vastly different. I prefer the CE version just because of the higher resolution of the screen and the larger maps that the CE version can handle.
Battery life on the epods was severly impacted while using the GPS, so if you take a trip longer than 4 hours, I suggest you get a cheap power inverter so you can plug the epods in to the inverter and have it on AC instead of battery.