From what I've heard, that's one of the problems with the Squier series. Fender does not feel the need to be consistent with what parts they use for anything.
Having said that (speaking of Fender-produced humbuckers), when I got my Fender Showmaster Celtic H, I was figuring that I was going to have to replace the humbucker. After all, The name "Fender" doesn't exactly bring the phrase "quality humbucking experience" to mind. However, I've been quite pleased with the Atomic II 'bucker in there. It is VERY hot, surprisingly hot, 16.4K impedence to be exact. My only complaint with it is that it is so hot, that I have to be careful with my AD30VT or the clean channels will overdrive slightly. That's why I've got the plans for my Charvel tele. I'll have one guitar with a hot humbucker and one with a couple of nice single-coils.
In case anyone wonders or cares, I found out that the only difference between the Atomic I and Atomic II is the string spacing.