I think the Termi and the Akra are both very nice systems. I think the Termi outsells the Akra for several reasons. The first is price, when all said and done the Termi is cheaper to buy, install, tune and run as compared to the Akra. That being said, I think the Akra looks better than the Termi (and I have the Termi on my personal bike).
It's just that the Termi comes with a pre-programed ECU for cheaper than the Akra which comes with no ECU. You still have to buy either a DP ECU or a programable ECU to run the Akra correctly.