FX-950 - same tech, good old fashioned knob.
For some reason, they only make this for 220V input.
It's a meh upgrade. IMO to small to be worth spending the money. Basically the same thing with a bit more power.
If you live in the US, it's a really inexpensive upgrade, though. $100-120.00. If you already shop at Fry's and wait for the annual 888 sale, even better.
I initially missed the dial, but I prefer using presets, now. The benefit is they are more repeatable. For different size tips, I use different settings, and the presets keep everything consistent. Heck, without the presets, my settings would just drift and I wouldn't even know I'm using distinctly different settings by now. I'd still be attributing these adjustments to my memory or the board. I don't want to look at the station to change temps/presets, though, so I hacked my Hakko with 5 physical preset buttons and a microcontoller.