Sorry to hear this happened....especially with the misidentification and the parasites. Divers Den is WYSIWYG, so keep that in mind when refuting AquaCentral. It sucks, but it seems like you picked up a great fish! It's also great you have a 125 to give it room to grow.
Mokes and weeksiis can look somewhat similar because they both have mustaches , but weeksiis do get substantially larger. As others have mentioned finlet count is a great way to tell the difference. Some visual cues I look for:
weeksii: wide, fat head, kinda thick, stripes are similar to a congigus or a delhezi( stripes typically stop at a halfway point on a lateral line of the body.
moke: camouflage patterns. Either striped pec fins or solid colored. More slender/long. Again, very few finlets.
All of the members on here who have weeksiis seem to really cherish them. I also cherish the weeksiis for them! Perhaps, some of the members can talk about their weeksiis, without convincing me to buy a weeksii. ?
Burbotman
Vancouver_98683
DMD123
Hao