Ah, it's dishwasher month!
Yes, the AEG is from the mid nineties. I bought my first AEG in 1994, a 578, due to problems it was replaced by AEG in 1995 with the model 6060 (for a little extra I got a higher end model), from the new line with four digits. I think this line was replaced already again in 1997 or 1998 IIRC.
The Whirlpool is from not too long after the full take over of Philips by Whirlpool. It doesn't have the typical Philips upper rack. So my wild guess is that the Whirlpool dishwasher is from the early nineties.