两者性能差不多，价格差不多。后者稍微专业些。前者适合上学用。
Lowepro的top比较大，可以带下一个letter size binder，学生适用。tamrac的bottom比较大，比较深，适合用大镜头大机身的人。
Lowepro CompuDaypack
Top Compartment: 12.6 x 5.5 x 11.4 in. / 32 x 14 x 29 cm
Bottom Compartment: 11.4 x 5.3 x 5.5 in. / 29 x 13.5 x 14 cm
External Size: 13.8 x 8.5 x 17.5 in. / 35 x 21.5 x 44.5 cm
Weight: 2.5 pounds
Tamrac Adventure 7
Top Compartment: 10 W x 5.25 D x 9.25 H / 25 x 13 x 24 cm
Bottom Compartment: 10.5 W x 6¼ D x 6.5 H / 27 x 16 x 17 cm
External Dimensions: 13.5 W
