There are so many proposed Soyuz booster upgrades, I cannot keep them straight.
I was wondering if there is a good comparison chart between the various proposed upgrades, including engine information.
For example: The traditional Soyuz, used to launch manned and unmanned flights to the ISS. The Soyuz-ST used to launch satellites out of Korou by ESA. The Soyuz 2-1-V just launched.
There are a variety of proposed Soyuz 2 variants proposed as well.