Nairobi "more lucrative"
They, however, said that rents have been falling in Dar even as growth remains steady in Nairobi, making the Kenyan capital more lucrative in terms of return on investment.
“Honestly, we are struggling to sell space in Dar. So based on a long-term view, Nairobi’s capital value will be higher,” said Ben Woodhams, the managing director of Knight Frank – a property firm with a footprint in Kenya and Tanzania.
You forgot to put that part. Also you forgot to mention that world bank looked at office space prices at that time Nairobi had an oversupply thus demand and supply curve dictate that prices have to go down. The only reason was the lack of good offices in dar hence prices shot up. Please always read your own links before posting.