The Pace ADS200 does everything better than the Hakko FX951 in my opinion. Since I got my new Pace stations I also picked up a couple of FX951s and no I would not recommend them if it came down to station vs station, stand vs stand and handpiece vs handpiece, I'd give it to Pace everytime. The Hakko FX951 does have a slightly smaller footprint though.
If you picked apart the Pace ADS200 completely it would be that they use an old micro controller which will be on purpose because they use it in all their products and it's socketed so can be easily upgraded in the field. They use a 7 segment display probably more for reliability than anything. They use an older voltage regulator to power the micro, probably also that it's a jellybean part.
Unfortunately noone has made real clear videos on the Pace ADS200s heating performance on the latest firmware (which is a lot smoother). But this video with the Pace TD200 handpiece running on the Unisolder shows how quick the standard tips heat up.
That is also another option, there is no reason why you can't controller mod your station at some point in the future and leave it still fully reversible. The case and front panel are perfect for modding, about the same size as the Blackjack modded case.