It is a twin scroll but does not feature a single merge collector for all runners.
You can't compare a HKS manifold to a simple log style as it sits somewhere between the two types in its design as the runners are blended far better than a basic log. It has shorter runners than a 6Boost which may be helpful for better boost response but who knows how much better?!?!
Last I checked 6Boost are not exactly equal length (although they are close), as Kyle has stated that as long as you are close enough it makes almost no difference.
For a twin scroll to work you need to separate the front 3 cylinders from the rear 3 which the HKS manifold does for both the turbo outlet and wastegate port.