Cue Ball Rotation vs Tip Diameter

[dr_dave]

Is a long draw shot easier with a 12mm compared to a 13mm or is it purely stroke mechanics?

It is almost entirely stroke mechanics. See:

draw shot technique advice​

Is there science behind this answer?

Yes:

cue tip shape and size effects

draw shot physics-based advice​

 

[skor]

Just think of all the times that you accidentally applied spin to a break shot and how much spin and action you got using an average of 13mm rock solid tip with somewhat flat tip shape…
It’s all in the stroke

 

[garczar]

Just think of all the times that you accidentally applied spin to a break shot and how much spin and action you got using an average of 13mm rock solid tip with somewhat flat tip shape…
It’s all in the stroke

Ever see close-up of some of the BEST snooker player's tip? Looks like a dog chewed on it. Squashed, flattish,funky and they can draw their rock 10ft on demand.

 

[Hail Mary Shot]

Ever see close-up of some of the BEST snooker player's tip? Looks like a dog chewed on it. Squashed, flattish,funky and they can draw their rock 10ft on demand.

I've seen those dreadful tips.