I have been to both places and for shear quantity of neolithic sites Orkney stands supreme. I love both places, but I really think that there is more in the East in this instance.
- Ring of Brogdar
- Scarra Brae
- Maeshowe
- Stones of Stenness
- Ness at Brogdar
- Earl's Palace
- Bishop's Palace
- St. Magnus Cathedral
- Eagle's Tomb
- The Italian Chapel
- Churchill Barriers
- The Brough of Birsay
- Balfour Castle--I like the walled garden
- Highland Park Distillery
- Artist tour--jewelry, tapestry
- Martello Towers on Hoy
- Wild life--birds and sea life.
- Music.
- Great Walking
- Diving opportunities.
Now, there are good things on Lewis and Harris, but not as much.
- Callanish Standing Stones
- Carloway Broch
- Viking villages--Black houses etc.
- St. Clement's
- Butt of Lewis Lighthouse
- Spectacular beaches--Luskentyre and more.
- Visit tweed weavers
- I think that there is a distillery, but Highland Park is one of the top ones.
- Lots of beautiful walks.
Both have nice villages. Kirkwall has 20,000 people, Stornoway has 6,000. With Orkney you can stay in Kirkwall or a wee village on the Mainland and reach just about every where. Lewis is bigger with some of the above sites being at the far end of Harris--St. Clements--and some at the far tip of Lewis--the Lighthouse.
This should give you some things to think about.
Pam