Progress and Soyuz don't use the same launch vehicle. Progress currently uses Soyuz-2 booster (Soyuz-2.1a specifically) while Soyuz uses Soyuz-FG. Soyuz 2 is a

Progress and Soyuz don't use the same launch vehicle. Progress currently uses Soyuz-2 booster (Soyuz-2.1a specifically) while Soyuz uses Soyuz-FG. Soyuz 2 is a new generation booster that has a pretty bad track record due to the quality control issues. Soyuz-FG is old generation booster that had a perfect track record until now. See https://en.wikipedia.org/wiki/Soyuz_(rocket_family)#Variants https://en.wikipedia.org/wiki/Soyuz_(rocket_family)#Variants