i can not comment about the particular cartridges you are discussing, but i own the VDH frog, ZYX airy3 and UNIverse. In addition, i own a Sumiko pearl and have owned many Shure MM cartridges early in my audio life. Comparing VDH Frog vs Airy3 (similar price ranges), i prefer the ZYX airy3. Both are very good cartridges. The sound stage and separation of the instruments is so much cleaner with the airy3. Bass response is a little better with the frog. Both are very fast and true to the music. playing classical or complex jazz albums really show the difference particularly when horns, strings and percussion are all present.
