In the case of Russian lips, tiny droplets of filler are injected vertically, starting at the base of the lip and working its way towards the border. It goes from the inside out!
On the other hand, the classic technique works horizontally from the borders towards the body of the lips, which gives you more prominent lip borders.
The Russian lip technique focuses on achieving height and improving cupid’s bow, whereas the traditional technique aims at volume and lip contouring.