If I were u (& I'm not obviously) then I would stick with Sony, as u've had good experience of their machines, it appears. It's a brand u seem to trust, and if it were me, then there would be no choice.
Samsung may well have comparable machines, but you will inevitably be comparing it to the
Sony(s), and after you've bought it, you might not like what u see and regret it.
As for your requirements, you have already stated that 'For this I have found the Sony to be superb'.