Sofa Reviews & Guides The Complete IKEA Sofa Guide What’s the difference between the IKEA Backa and Backamo? by Chuck April 26, 2015 If you're wondering if your Backa 2.5 seater sofa covers can fit your Backamo 3 seater or vice versa, then you're at the right place. Alternatively if you just want to know what's the difference between a Backa 2.5 seater and a Backamo…