quite hard to tell which hakko units have internal pumps and which ones rely on external pumps
474 - unclear. there is a nozzle, but i don't know whether that nozzle is an air intake or source of vacuum (NOW CLEAR -- this has an internal pump)
475 - very clear. the nozzle is for connection to a vacuum source
484 - internal vacuum pump. not a bellows unit, just a very compact compressor. looks nice.
808 - workhouse integrated vacuum pump unit with pistol grip that we all know and love.
the modern hakko stations are all designated FM-XXXX
FM-204 - modern version of 474. has an internal pump.
FM-203/206 - superpowered versions of the 204. COMPLETELY non-obvious from all the poorly translated product pages, but i believe both stations require an external compressor.
i think aoyue has only cloned the 474 and possible the 475 at this point. from all reports, the clones are close enough in construction that you can use the far superior hakko filters and tubes in these units - just the electronics and pump (if applicable have been cloned), as well as the pencil.
you may think these are expensive at 100$, but the hakko price is 1000$, so think on that for a bit
note that the FM series tends to have full rework capability. that is, it can switch between soldering, desoldering and hot air (suck, blow, just temperator regulation mode). that and the improved analog section indicated by the insane thermal accuracy and recovery of the 888d are basically what differentiate the new models from the old.
(by the way, for those looking at the aoyue 474, check out the 474a++, it seems to obselete the 474. the basic design is the same but it looks like the A++ achieves better parity with the hakko 474. eg, the aoyue 474 cheaps out on the vacuum pump by using a dual chamber unit vs the single large chamber unit in the 474, etc..)