別物だけど、どのディーラーも区別なく3186や3285と記述してるよ

2824：SA3285表記、3186刻印
https://www.intime05.co/rollie/6350-gmt-master-ii-126710-blro-real-ceramic-904l-ss-noob-1-1-best-edition-on-bracelet-a3285-correct-hand-stack.html

2824：SA3186表記、3186刻印
https://www.intime05.co/rollie/7178-gmt-master-ii-126719-blro-black-blue-ceramic-316l-steel-bp-1-1-best-edition-black-dial-on-ss-bracelet-sa3186.html

VR3185（安全）：SA3186表記、3186刻印
https://www.intime05.co/rollie/6416-gmt-master-ii-116710-blnr-black-blue-ceramic-904l-steel-vrf-1-1-best-edition-sa3186-chs.html