Thank you for the feedback, as well as the tip about the Priceline offer. Looking at Priceline's zone map, I wasn't quite as comfortable about the possible outcome, given the size of Priceline's Gatineau West zone. In the end, I chose the HOTWIRE offer, and I did get the Four Points.
An excellent outcome because I'm attending a conference that weekend at the Canadian Museum of History — right across the street from the hotel — and factoring in the sales tax I'm saving about US$40 (CDN$55) per night off the group rate my association negotiated. Probably more, given that the group rate only applied to Friday and Saturday night.