OK, well all sorted now. Absolutely nothing wrong at all with the television. I work in media and am probably a bit too sharp on the differences, but not only that Samsungs software default settings are absurd. The engineer spent some time re-adjusting the sharpness through the driver and recommended never to use dynamic. I'd already fiddled, but being a perfection freak didn't realise that component was never going to be as good as VGA - with adjusted settings though, near-as-dammit.
That said, I think there is some kind of scaling issue when using component as the jaggies on games are far more noticable than on VGA. Component does offer richer colour however. I guess it's up to me how to play it. Not only that, also discovered EA use Samsungs only for games testing! They're quite highly respected by engineers, apparently, along with Loewe.