I have both a Beco and an Ergo. I think they are very similar. I'm short and prefer the Beco...better fit. The Ergo's straps are a bit chunkier with padding and the material is a bit thicker/heavier (more a canvas like material). IIRC...haven't used either in a while. As for how you wear them, how they go on/off, the carries, etc. they are very similar.
Mom to two amazing DDs ('07 & '09) and a fur baby.
Gluten free since Nov '11 after non-celiac gluten sensitive diagnosis. Have had great improvement or total elimination of: migraines, bloating/distention, heartburn, cystic acne, canker sores, bleeding gums, eczema on elbows, dry skin and scalp, muscle cramps, PMS, hair loss, heart palpitations, fatigue. I'm amazed.