On Hotwire sometimes you can deduce which hotel you are being offered from the description of amenities and the reports of hotels received through HW at sites such as betterbidding.com. Then you might be able to verify the room configurations and arrangements.
One time, for example, we were traveling with one of our kids and I was able to deduce that HW was offering me a Courtyard by Marriott, which I knew would have a sofa bed.
Real life example of what I'm talking about.
I have a conference coming up in November. I went to reserve a room at the conference hotel (a Doubletree) through the conference website. Conference rate is $86/night, but when I go to book the conference block is sold out - and the Doubletree now wants between $186 and $250/night.
So I go start checking PL; I go to BiddingforTravel and BetterBidding to see what people are getting. At PL, I can see that people are getting rooms that are far enough away from the conference site that I would likely need to rent a car to get to the conference, which would negate a substantial part of the cost savings.
But when I check the list of hotels and amenities for Hotwire at BetterBidding.com, I can see there are a couple of hotels that show up frequently at Hotwire that are within one-quarter mile of the conference site. So I ask for a Hotwire offer, and I see a 3* hotel being offered to me for which the listed amenities identically match those for a Holiday Inn two blocks away from the conference hotel. Further, there have been no other hotels reported with that combination of amenities at the 3* level.
So I'm pretty sure that the hotel being offered to me is the Holiday Inn two blocks away from where I need to be. So I take the Hotwire offer, and I'm right.
There's no way I could have had that kind of precision with PL. In fact, given the recent reported successes at BFT, it's likely I would have wound up about eight miles away.
I could report virtually identical stories where I have been able to use Hotwire to secure the Radisson in Waikiki, the Islander on the Beach and the Best Western Plantation Hale in Kapa'a.
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The point is that if you want to target a specific location, you can often use the listings of hotel amenties on Hotwire to accomplish that. If you have flexibility and don't need to be in a specific location, PL will likely work better for you.
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One of them is not better than the other. They are similar, but still different. When you know the differences you can use whichever one works better in your specific circumstance.