We have both the Combi Roanju and the Stokke and I found them both useful - for different periods. I really liked the Roanju for the newborn stage as a sleeping cot that we wheeled into our bedroom at night and used in the living room during the day. As bubs got older and we moved him to a cot (around 2 months b4 he could roll over) the Roanju was good as a feeding/rocking chair. We got the Stokke when our son turned 2, and it was great for a while but now that he's almost 4, he refuses to use it anymore, preferring our regular dining chairs. I still keep it around as it doesn't look out of place around our dining table (we've given the Roanju away) and I hope he'll reconsider using it later.
I also thought about the Rashule (older model which is why it's cheaper) but ended up buying the Roanju and in retrospect, I'm glad we did bc the design is better and more importantly the chair has better ventilation and when the baby's in there for a long time, I do think it makes a difference.