The difference lies in the setting, not the ambition.
In personal training, you work 1:1 with your coach. Each session is entirely tailored to you. The pace, content, and breaks are exclusively dictated by your goals and your current condition. This is the most intensive form of support.
In 2:1 semi-personal training, you train with a second person of a similar performance level. One coach supervises both of you concurrently. Your training plan remains individual, but the execution happens simultaneously. You benefit from clear structure, high coaching density, and added accountability, without compromising on quality.
Both formats follow the same standards in planning, technology and support. The decision depends on whether you want maximum exclusivity or a structured setting with a shared focus.