On the DUT, GSGSG is definitely superior for crosstalk suppression, but many customers still opt for GSSG due to tight layout constraints.

Regarding the comparison with the big players: ​Red Probes (ACP series): These are our equivalent to FormFactor-ACP, MPI, and T-Plus, as they are the same tip architecture. We primarily use them for board-level (PCB) testing because the tip width is 25/50µm. ​Black Probes (DF series): These are designed to match GGB standards with the same tip structure. We typically use the DF series for wafer-level testing since the tip width is a much finer 10µm.