I've had Tektons and as good as they sound (for the money) they are not made that well or should I say they are made to a price point. its the cabinet work that's lacking IMO, that is where they are saving money to keep the pricing down. From pictures I'd say Zu is ahead in this area, sound I do not know.
Personally i couldn't live with the looks of the semi gloss paint and poor cabinet quality. Not saying they are bad just that's where Tekton saves money to meet a price point. it would be nice it they offered an upgraded cabinet for those who wanted it.