It all depends on who you ask. I have heard people say that they have seen the PS62 apart and also had the HTB2 62 apart. Some people have said there was no difference, others said there was. I know of one person that did have both aparat and said there was no difference. As for the SPS62, I am sure it probably is different than a standard HTB2
I have a source to get a look at a SPS66 and could easily order in a prostreet 66 charger from HTT, but have just never gotten around to it.