I have not used Osmand, so I can't compare with MapsWithMe. If you try both, let us know which you prefer and why. Since MapsWithMe lite is free, you can certainly try it without a significant investment. But realistically most apps cost less than a good meal at a restaurant so you can try several.

There are so many offline mapping apps out there that everybody will have different preferences for different reasons.

Having a couple apps that use different map sources might come in handy if you are in an area where road construction has changed the road locations. For a couple years my Garmin kept thinking that I was driving thru a corn field because of road construction moved the highway.