PS3 SKUs are fucked up as hell and are worse than the 360 situation, but it's not for the same reason. They have never really had two on the market at the same time until this holiday.
20/60 -- 20 was gone by January
60/80 -- 60 was gone by October
80/40 -- 80 is being phased out but apparently will be re-bundled
It's like saying MS has the core, arcade, pro, premium, halo, elite....they aren't all out there at the same time. at least not with official marketing support and such.