I have both, but I got the FX Aid XL first, great fx module use it all the time, so much so that I wanted a dedicated reverb to get more use out of the FX Aid. I mean I also have a clouds clone and use that as reverb. I am always on the lookout for a good reverb, have my eyes on Death by Audio Rooms Reverb and then I can try the other modes of the Versio platform.
In short: You can never have enough reverb, the FX Aid is great lots of algo's to try. I got this first and a dedicated reverb when I wanted use other algo's in FX Aid and not lose a reverb (love the lofi junky algo). Don't forget pedals these are a great add to any modular system. The NE Versio platform is great, the distortion option would be a great add to any Dark Ambient (if you have any reverb even clouds/disting would be a great combo)
The only thing I wish for the Versio would be a front panel usb mount as it stinks having to unrack the module everytime you want to switch modes.