I can only comment on the BB7. They work really well and are very durable, but can be a bit fiddly to get the pads properly positioned. Once the proper The Spyres get very good reviews. From what I have read, the Spyres are easier to set up due to both pads moving when brakes are engaged, ergo, they both are adjustable. It seems some of the efficiency is affected by what set up the bike has. Maybe looking at Youtube videos would help with the decision. Other than that, I guess the cost is a factor.
https://www.bikeforums.net/touring/1...trp-spyre.html
https://www.******.com/r/bicycling/c...or_trp_spyres/
https://www.velonews.com/gear/road-g...other-options/