I use Google Hotel search sometimes when I want to see a price calendar. What I often see is prices that are similar across Expedia, Priceline, and Hyatt site but then there will be "Go Splitty" and "Traveleuro" that will be $40ish less per night. I have never tried the low priced options since a) who knows what kind of surprise you would get if there is some issue and you need to rely on their customer service and b) I am one of those travelers who wants the EQNs and benefits that can be denied when booking with most 3rd party sites.

I wish Google let you exclude vendors, rather like Google Flights lets you de-select airlines.