Not exactly. Roller bearings are not ball bearings, hence the name. Probably the most common application of roller bearings is the automobile tapered roller bearings that are use as wheel bearings. Needle bearings are just roller bearings with very small rollers. I don't know how small the roller has to be to be called a needle, but the roller bearings used in the old A9 headsets look way too big to be needle bearings. But, that's just my observation and if somebody wants to call them needle bearings, it's fine with me -- I know what's meant.

Those A9 bearings are not cartridge bearings in that the races and bearings are not all put together in a single unit, but the rollers are not loose, either. They're held together with a retainer.