I prepped us for this earlier in the year and had it down to UniKote v. Grunig 404.
Grunig has a cleaner design and smarter trough but only coats one side at a time and requires some toggling of the holder when you flip the screen. It does not have digital presets, just some knobs to control all the variables. All electric. Costs a little less than the uni. If you can get away with coating from one side only and don't need to adjust from mesh to mesh it would be the best fit option. I fear that operators might forget where in the coating process they are at if you have to flip the screen manually, adjust settings, etc.
UniKote has a few design elements I'm not a fan of but I've seen Danny's and it checks out ok. Digital presets for some parts of the coating process, two sided coating which gives you more flexibility. The big advantage of the unikote is that an op can load it with one hand more or less, hit the button, walk away and the unit will coat it however you like 2/1, 2/2, etc. without a need to flip the screen or toggle dials around. When the op returns, if the screen has emulsion on it, it's done. For this reason I'd choose the unikote if you have more than one coating method and/or need to coat from both sides, as it eliminates operator error better than the Grunig.
The feedback I've received on dual screen coaters is to stick with single screen. The dual screen models have a rep for being hard to adjust to coat both screens accurately. The two big benefits of auto coating are perfect consistency and the ability to free up your screen tech- you don't want to loose the advantage of consistency or tie up your tech fiddling with the machine. Besides, the single screen models will be more than fast enough for most shops and save a good deal of footprint.
Hope this helps a bit.
