Be CAUTIOUS about the Late G kit 6268... I have recently read somewhere that current boxings of this kit may now be coming with DS band-tracks rather than the MagicTrack link set formerly offered in this kit. I have no confirmation on this report, but perhaps be careful and confirm that you are indeed getting what you actually EXPECT and want, whether that be the rumored DS things or the formerly standard link set.
BOTH are great kits in all respects, track-set questions aside. get either one and have a nice kitty on the shelf!
Production date is almost "everything" with Panthers - the Late G kit allows you to build a post- SEP 44 Panther with substantial base accuracy - Panthers completed after late SEP 44 lacked zimmerit, as is the case with the kit. The G with zimm kit portrays a pre-SEP 44 production G. These did of course serve to the end... however, one may wish to consider showing more zimm-chipping and wear if modeling a kitty in early '45 from that kit. Unless you are positing a specific paint-scheme for a specific individual Panther, remember that pre-SEP 44 Panthers were probably all base-coated RAL 7028 Dunkelgelb and all probably also had some version of a tricolor scheme. A later Panther post-zimm MAY have been painted one of those less-common schemes based perhaps on olivgrun or maybe, latest in the war, even on rot-oxide (NO, I am NOT endorsing that hypothesized and loudly-argued scheme for any Panther - just noting that the olivgrun and hypothetical rot-oxide schemes are probably NOT appropriate on a zimmed kitty...).
Bob