All Blue Steel had a folding fin.
The later Mk 2 Vulcans had two hard points for Skybolt (not 4) and of course the more powerful 301 series engines for the greater AUW.
The generation time for the bomber wings was IRO 5 hours for free-fall, 16 hrs or more for Vulcan BS and could be measured in days for the Victor force.
IIRC the Mk 2 Victor only ever carried the Blue Steel.
BTW, the load to acceptance time for a Yellow Sun on a Vulcan was about 7 minutes. With WE177 our staish went spare when it took about 95 minutes. Once the teams were worked up is was cut to about 35 minutes.
One way of saving time was for the Load Chief's final inspection to be overseen by the Nav Rad's take-over checks. With WE177 and the additional weapons settings that changed and both Navs had to do it after the load was checked.