@RachelNZ -
Walked it in the first week of May 2016. You ask a big question in "how does it compare?" I'll break it down into components.
1. Walking - generally comparable with some good gravelly paths, some farm tracks, areas of mud. Lots of stiles to cross on some sections, that's new. Markings are generally good though not as bountiful as the Camino. I am not tempted to walk it again despite having enjoyed it immensely....too much road walking!...on narrow roads and buses come by within inches. But I was very glad to have walked it once as were my wife and friends.
2. Lodging - there are no albergues so you are in B & B's the whole way.
3. Food - take your pick, it's all there from pub food to high-class dining. Prices were reasonable for the fare, just do not expect the economy of a "menu al dia" or pilgrim's menu.
4. People - not a lot of people on the track when we were there. I think we came across a dozen in the week's walk. That said, we were absolutely bowled over by the hospitality, warmth and good humor of the Irish people we met at every stop.
5. Scenery - we found every bit of it lovely.
6. Logistical planning - the sooner you start the better. I began the December before going and was glad to have made lodging arrangements by the end of February. I was told several times that it was a good thing that I was not attempting to book for "the season" starting in June through August.
I do not know how soon I will be back to the computer. If, after this post, you seriously desire to go and wanted particular details, feel free to PM me. That will alert me via e-mail for a timely follow-up with you.
B
EDIT: I remembered a useful site for all walks in Ireland. Well worth a visit! Link:
http://www.irishtrails.ie/