I have a MSL Platinum, and it sounds great. I haven't heard the Goldfinger.
This would also be a good place to search and to ask your question.
Clearaudio Goldfinger Statement v2 vs My Sonic Lab (MSL) Signature Platinum
I have been using the Goldfinger Statement v2 on a Graham Phantom Supreme tonearm for quite a few years and am thinking about upgrading the cartridge. Clearaudio has just released the Statement v2.1. I am not sure if I want to stick with Clearaudio. I do love the Statement v2, but I also want to explore other brands. One brand that comes to my mind is My Sonic Lab as I listened to one of their models (not Gold or Platinum) on the same tonearm in a friend's house and it sounded very nicely. I read the background of the designer for MSL and it is very intriguing. Would you share your experience with both cartridges?