Hey Shayla,
Congratulations are well deserved. Legend is quite a milestone. For what it's worth I came up with my own way to compare balls of different prices. While it works on the principle of lower number = better value, that's only from a cost point of view. And you have to decide for yourself if greater distance, durability, meter speed, or more spin is most important to you. It works like this:
(COST? BALL) / Dots of ball performance.
Your WGT TOUR G1 SD are 112cr/sleeve, or 37.33cr/ball They have 6 dots of performance, So 37.33cr / 6 = 6.22 ball value factor (bvf)
WGT LEGEND G1 SD2 cost 120cr/sleeve or 40cr/ball They have 7 dots of performance. So 40cr / 7 = 5.71 bvf
Virtually all of the premium balls have a 2.5 durability rating, compared to a rating of 1.0 for your TOUR G1 SD.
Callaway Hex Chrome L33 at 250cr/sleeve have 11.50 dots of performance. (83.33/ball) / 11.50 = 7.25 bvf.
Volvik Crystal L51 are 400cr/sleeve, or 133.33/ball. (133.33)/ball / 13.50 dots = 9.88 bvf.
Nike 20Xi - X (distance) L48 are the same as the Volvik, 9.88 bvf, while the L71 is 10.34
Nike 20Xi - S (spin) L47 are 10.26 bvf, while the L70 is10.71 bvf.
I've tried the Callaway, the Nike L47 spin balls, as well as the Volvik L51. I had trouble with the Nike not holding the putt line, and the Volvik seems to have more rolling resistance. I left way too many putts short. The Callaway (I use the L37 Vapor ball, same specs) seems to work the best for me. I took some test shots on Kiawah #2 under as equal conditions as possible, and I had the Callaway out drive the Volvik by 4 yards. Surprisingly, I drove the WGT G13 S Vapor balls 290 yds in the same test. It has no distance enhancements. But I would guess that as a Legend you're now moved back to the longest tees and need some distance enhancement. However, we all play the game a little differently, and so those results are just from my game. I've thought about trying the Nike distance balls and see if it's better for my game than the L47 Spin ball.
If you have Scotts Pro shop spreadsheet, you can easily compare the performance specs of all balls sold on site.
Hope this helps a little bit.
Phred952