For U.S. TEAS:
Breakaway
Albums Sold - 6,296,000 albums sold
"Since U Been Gone" - 2,736,000 singles sold - 273,600 albums sold
"Behind These Hazel Eyes" - 1,508,000 singles sold - 150,800 albums sold
"Because Of You" - 1,803,000 singles sold - 180,300 albums sold
"Walk Away" - 1,224,000 singles sold - 122,400 albums sold
TEAs sold - 7,023,100 TEAs total
B'Day
Albums Sold - 3,360,000 albums sold
"Deja Vu" - 652,000 singles sold - 65,200 albums sold
"Ring the Alarm" - 586,000 singles sold - 58,600 albums sold
"Irreplaceable" - 3,350,000 singles sold - 335,000 albums sold
"Listen" - 717,000 singles sold - 71,700 albums sold
"Beautiful Liar" - 1,419,000 singles sold - 141,900 albums sold
"Get Me Bodied" - 590,000 singles sold - 59,000 albums sold
TEAs sold - 4,091,400 TEAs total
Considering Breakaway was considerably bigger outside of the U.S., it is clear which era was bigger.