this is completely subjective. it has been my observation that far more shooters/ owners prefer the ergos of their SKS than AKS and I personally spent 3 years trying to find a setup for my AK that was comfortable and never did before selling it. so far every setup I've tried with the SKS has been more comfortable than even the best AK setup I've tried.
the AK is great to a lot of people for a lot of reasons but ergonomics is almost never the reason. you are also basing your opinion on a siaga which is not a true AK. it is a sporting rifle made in russia that uses similar parts and method of operation and many people convert it to look like an AK but the gas system, trigger, and furniture is not the same and so really should be used as a comparative model for the AK.