The Nittaku ball IS vastly superior. The QA is two levels better. Not saying that there are no good DHS balls, it’s just that you sometimes get a bad batch. Never had that with Nittaku. Those are always 100% round for me.
And I'm good with you feeling that way. I guess what gets me, and not saying this is you, but to me it seems there are a lot of Nittaku snobs out there. We live in an age where there's several plastic balls. To some level, we all have to adapt and be willing to play with a different ball.
Here in the states for example, I believe it's the Joola ball, the butterly ball and the Nittaku ball approved for USATT events. So some of these people might have to play with a different ball than what they want if they show up to "X" tournament.
But there's this one guy at our club who will not play a match, practice, whatever unless we do it with the Nittaku ball and it just irks me I suppose given our club pays to supply DHS balls. He brings his 1 ball and we're chasing, bending down and picking up that one ball after every point. I'm 40 and mindful of wear & tear on my knees & back.
He's not the only one who feels this way. For one reason or another, there are those Nittaku ball snobs out there. Just my impressions.