The machines are wonderfully complimentary — I use my Nomad for intricate metalwork, while the Shapeoko gets used for larger scale projects (working up to some furniture designs).
The Nomad is the machine for putting on your desk and small projects (though folks have done some pretty large-scale projects: Nomad - Large Aluminum Part ) while the Shapeoko is the machine to put out in the shop (though I run mine in the basement).
That said, the Shapeoko does small and intricate quite well: Making a Stainless Steel Watch Case and Back on the Shapeoko 3 (Start to Finish) and my first project on mine was a small pair of locking register calipers: Locking register calipers after H.O. Studley
If you want to do small, intricate, 3D parts which take advantage of the fixtures for the Nomad such as the low profile vise or the flip jig, definitely consider it. If not, a Shapeoko should work well, esp. if you invest the effort into an enclosure.