Bosch GST 18V-125 S (w/o Battery)

When comparing the Bosch GST 18V-125 S and the GST 18V-155 SC jigsaws, both are cordless, 18V tools supplied without batteries, making them suitable for users already invested in the Bosch 18V system. The most notable performance variation lies in their cutting speed, as the 18V-155 SC operates at a maximum of 3800 beats per minute compared to the 18V-125 S's 3500 bpm. Furthermore, the 18V-125 S includes Bosch’s pendulum action feature, which is absent in the listed specifications for the 18V-155 SC, suggesting it might be better suited for faster, rougher cuts. While both models share an identical aluminum cutting capacity of 20mm and feature brushless motors, the 18V-155 SC is marginally heavier at 2.0kg versus 1.9kg. Ultimately, the decision hinges on whether the extra speed of the 18V-155 SC outweighs the versatility offered by the pendulum action on the 18V-125 S.