The Jurys Inn at Parnell Street has a somewhat--though not drastically--lower rate, which is why I was considering it. Also I didn't know enough about Dublin geography.
I looked at the description of Jurys Inn Christchurch after reading your reply, and I see from the map that it is below rather than above the Liffey.
Is it a lot more inconvenient to get around Dublin from Parnell Street? How far a walk would you say it is from Moore Street Plaza to Christchurch? The difference in cost for three nights would be 69 euro, which I would not see as outrageous if I thought the difference in ease or--very importantly--the feel of the neighborhood is going to be significantly better. Is there more of a "downtown" feel--more like you're in the midst of Dublin life at the Christchurch inn? A person at the reservations office told me that the Parnell Street inn is quite new. Can I suppose that they are equally comfortable?
South of the Liffey River is the most desirable area to stay in Dublin, which is why I suggested Jury's Christchurch. It has a much better location than the others you are inquiring about. You need to keep in mind that the Jury's Inns are not fancy hotels. They are clean and comfortable but if you want something outstanding you will pay much more. Dublin is the most expensive place to stay in Ireland and sometimes finding a place to stay can be a challenge. Since you are spending a few nights in Dublin inquire about a mid-week or weekend special. You should be able to get lower rates than with a one-night stay. You may also want to check for specials at some of the following websites:
Thanks for the advice. I have switched over to the Jurys Inn Christchurch. I'm not so concerned with how fancy it is. I like the "clean and comfortable" part.