Skill Link: 25 Base power x5 = 125 base power with 5 hits
Technician: 25 Base power x2 = 50 base power + 1.5x more damage on each hit = 75 Base Power with 2 hits
Skill Link is generally more powerful than Technician by 50 base power. However, note that Technician still gives Skill Link competition, as if Technician gets three (or more) hits instead of two, Technician wins over Skill Link (or is tied with three hits).