There is basically no difference in the Score Editor and the Synthesis Engine provided by Yamaha among different Vocaloid 2 products.
If a Vocaloid 2 product is already installed, the user can enable another Vocaloid 2 product by adding its library. #RUSSIAN VOCALOID 3 SINGER LIBRARY PROFESSIONAL#.#RUSSIAN VOCALOID 3 SINGER LIBRARY SOFTWARE#.#RUSSIAN VOCALOID 3 SINGER LIBRARY FULL#.
