Considering Vortex doesn't make anything and just out sources their optics it's quite possible that other off brands look the same. But that doesn't always mean that the glass and features are the same.
My big problem with off brand optics is they advertise a great warranty but the warranty is only as good as the company. If they go out of business there goes your warranty. IMHO there are enough "name brand" optics that there really isn't a need to go with an off brand.
