Read the article;e they posted before assuming the worst:
The only items not transferable are:
Consumable Items used for battle, growth, and enhancement
AC and SG can be used in both PSO2: NGS and PSO2. Because Meseta, FUN, and other currencies greatly affect the balance of the game's economy, these cannot be shared between PSO2: NGS and PSO2.
Character growth will not be shared between PSO2 and PSO2: NGS.
Weapons, Units, and Mags obtained in PSO2 can be used in PSO2: NGS as well. However, their functions, abilities, and appearances will change in accordance with PSO2: NGS's game system.
That first lists literally tells you the ONLY ITEM NOT TRANSFERABLE. Costumes and the like are items and since they weren't listed and the fact that AC and SG is interchangable, the cosmetics WILL transfer to NGS.