Which size of roulette ball is better?

When playing with advantage, which size of the roulette ball is better and why?
Assuming the ball is made of the same material?

IMHO the larger the ball diameter the better because they tend to bounce and scatter less than the smaller ball.
But having said that the very best ball is a large and softer ball for the same reasons as above.
There is no doubt the small very hard ball bounces and scatters more and more erratically.

scatter is also effected by the angle which is determined by the drop style of the ball to the wheel.ı’ve seen a wheel which the ball was 90 per cent falling off the track freely(with no dd but from the same where-between 3-6 deflectors) with almost the same angle (of course ı couldnt measure the exact angle but with eye observation it was same style) and almost 18-22 scatter often.ıf we would take that ball and put it into an other wheel behaviour of that ball and scatter might be different.

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Thanks,
I am also thinking about ball travelling on the track.
I would say the ball with larger diameter should be less affected with dust particles on the ball track.