As others have said the G20s due to the meter speed. I am not sure the reasoning behind using the starters ball but even with the G20s the longer approaches from legend tees will not stop the ball on many greens (I tried this when I had the G20s as an experiment).But with the G20s you can at least hit the ding with starters balls.
As you are level 89 the R11s will be available soon, so depends on how long you intend to use the starters ball for. But i have used the R11s with the starters and you need reflexes better than a cats to get near the ding lol, so I am no way recommending them as a suitable pairing!
If you plan to use the starters ball permanently, the G20s for me but if you change your mind in the future, you may regret buying them and then upgrading (spending more) to the R11s.