I play R9 driver and 3W, g10 irons and the legend tour "s". There are a few par 3's where the extra half dot really matters. Congressional #2 for example. And a few par 5's where I need the little extra, Kia #2, RSG #7.
Will be upgrading clubs soon i hope, so I may change, but for now the legend ball is the best option for me.
The big difference for me with the (s) ball is the short game. The extra spin is great around the green.