HIV-2 - people take longer to seroconvert ?

I've recently tested negative for HIV-1/2 at 14 weeks. However, I've reAd that some people take longer to seroconvert to HIV-2 because it's less virulus. There was something posted about 2 people in India who tested negative for HIV-2 antibody but positive for hiv-2 virus and it said because the virus is less harmful then antibodies may not kick in.Does this mean HIV-2 window period is different than HIV-1? I know that HIV-2 is supposed to be rare in the united states but ive also read that HIV-2 could be misdiagnosed as HIV-1 because it's not routinely differentiated from HIV-1. I'm desperate for an answer.