Same Items With Different Melds is this possible

[Kaurhz]

All Of tanks share the same Gear, SAM , MNK and DRG share same accessory and ( SAM and MNK share same gear )

I wouldn't worry too much, generally, the stat priorities are the same between the majority of classes that share gear, barring specific cases with Skill Speed/Spell Speed, to my understanding. In any circumstance, your aim should not be swapping out melds, but rather to find a middle ground that works for both of the classes, be it within the gear pieces you use, or the melds you apply to said pieces, be it with SAM/MNK, or SMN/BLM.