I have had great meals at both, but if I had to choose, I think I would choose Raglan Road. We have eaten there several times since it opened and have never had a bad meal sampling several different menu items over the years.
Have never eaten at RR but we did eat at Kouzzina just this past May for dinner and absolutely loved it. Definitely our #2 favorite (Boma is always #1). Kids liked it as well (they are 10 & 13 years). I had the most amazing fish with fresh herbs and garlic!