That you could almost interchange the add descriptions of the Paradox, Lock, and Nirvana.  Extremely strong shells on low rg high differential cores that start early, but have great continuation.  I am not about to spend the money to experiment, but it would be interesting to throw all 3 on various conditions and compare. 

No experience with Lock or Nirvana, but I do have a Paradox.  So far it was good on the Chameleon in an old Anvil Lane house, but not so good on the house shot in a different Anvil Lane house of the same vintage.  Heads are very bad in both houses, which limited the Paradox on both shots.  It was not useable on the Scorpion in the first house, but none of my other stronger equipment worked in that house either on the Scorpion.