Traditional soccer training relies on repetitive drills, while modern approaches emphasize personalized strategies that better suit individual player development needs. This study examined the effects of Small-Sided Games (SSGs) alone and in combination with Differential Learning (SSG+DL) on physiological responses, tactical behaviors, and technical skills enhancement of soccer players. Twenty male soccer players participated in this randomized controlled trial, assigned to either a control group (SSG, n = 10, age: 19.4±1.07 years) or an intervention group (SSG+DL, n = 10, age: 18.2±0.91 years). Physiological responses (heart rate, blood lactate, RPE), tactical behaviors, and technical skills were assessed before and after an 8-week training program (four sessions weekly). Large main effects of Time were found for technical/tactical skills including possession (η² = 0.83), passes (η² = 0.86), shots (η² = 0.77), tackles (η² = 0.73), and decision making (η² = 0.92). Medium effects emerged for heart rate (η² = 0.19) and effort (η² = 0.27). Group effects were negligible for physical measures. Significant interaction effects favoring the intervention were found for possession (η² = 0.42), passes (η² = 0.42), tackling (η² = 0.74), and marking (η² = 0.58). The intervention group showed larger improvement effect sizes (g = 0.11–2.61) compared to controls (g = 0.05 1.97). Integration of SSGs with DL significantly enhances tactical behaviors and technical skills in amateur soccer players compared to SSGs alone. These findings provide coaches with a practical framework to develop more adaptable players, particularly valuable for youth teams with limited resources, highlighting the importance of incorporating innovative training methods that emphasize variability and exploration.