They're not. When complete the Yale volumes will have more material than the BoT pair. But Yale is slow publishing, I'm not sure how far along the project is. Also the Yale volumes should be easier to read!

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In Christ's love and service

Mr. Tim Cunningham, Dip. CS (Regent College)
Member, First Baptist Church
Vancouver, BC

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"The Reformation was a time when men went blind, staggering drunk because they had discovered, in the dusty basement of late medievalism, a whole cellar of 1500-year-old, 200 proof grace—a bottle after bottle of pure distillate of Scripture, one sip of which would convince anyone that God saves us single-handedly. The word of the gospel—after all these centuries of trying to lift yourself into heaven by worrying about the perfection of your own bootstraps—suddenly turned out to be a flat announcement that the saved were home-free before they started. Grace was to be drunk neat: no water, no ice, and certainly no ginger ale." – Robert Farrar Capon