Crewed rockets are Soyuz-FG, other rockets used to be Soyuz-U, then Soyuz-2, variations Soyuz-2.1a and Soyuz-2.1b . Those are slightly different rockets - mainl

Crewed rockets are Soyuz-FG, other rockets used to be Soyuz-U, then Soyuz-2, variations Soyuz-2.1a and Soyuz-2.1b . Those are slightly different rockets - mainly engines of first stage (four booster parts) are different (if I'm not mistaken) and 3rd stage is different.