If you can afford it, you should upgrade it, you'll recieve a noticable buff. Most importent are weapons followed by the armour parts that get full enchantment values (head, chest, legs, shield)
yeah, the armor/weapon stat difference between v15 and v16 is minimal, but the enchants you can put on the v16 are larger than the v15 counterpart making it worth it to go to v16. Now with the ease of getting mats it wont be as much an issue as it was in IC
AD
Victorem
PC - NA - AZ
Vr 16: Morozov - DK
Vr 1: Zephyr Grimm - Sorc
Vr 5: Sad_Bunnie - Templar
23: Repressed-Canadian-Rage - NB
Voted "Most likely to squirrel off the crown" PC-NA