Personally I’d prefer the Gemini over the mixtrack pro 3. The mixtrack pro 3, is fairly basic with a lack of controls. The gemini has 16 pads that can all be used for 16 cues,16 samples, 16 loops all simultaneously, while the mix track pro 3’s pads consist of loop in, out, and auto, and 4 cue pads, limiting it’s capabilities to that of the Gemini. .. The DDJ-SB is probably the most professional looking of the 3; but the Gemini definitely tops the other two in terms of capabilities.