Except they don't complain about the same thing.

User "dal" offers a cheaper alternative (indirectly complaining that the Korg one is too expensive), while "blub" talks about that cheaper alternative is cutting corners.

So on talks about the Korg being too expensive, while the other talks about the aliexpress model being too cheap.

I know it could be difficult to wrap your head around, but hear me out: Different people could be complaining about it being too cheap, than the ones complaining about it being too expensive. And both of those groups can have good points about it!