I think the first one is the way Apple used to sell academic versions - it was the same for Final Cut. They changed their policy a few years back and decided to only offer a 10% academic discount. On that basis they couldn't fairly enforce the no upgrade policy anymore.There are two versions of Logic Academic:
1) A very cheap one (maybe 50% off???) that doesn't qualify for upgrading later. I've only heard about this one second hand.
2) A slightly cheaper one (about 10% off) that does qualify for upgrading later. This is the one I know about readily.