Considering that i know not a single instance that any ship did receive an item replace and how long Siri is already live it will surely not happen now. The only thing i can confirm in form of "a change" is that the Puni had a slight overhaul in the placement of rockets due it was in the earlier time so that Puni had a single Rocket on the middle bottom and after the overhaul has now 1 on each side for whatever reason.
Aside from that it gives no real reason to fly any of the other Siri ships aside of Myst and Puni due they excell in compare to all other Siri ships. Only reason why flying any other Siri ship is not having either Myst or Puni or having access to an Parsec/RDX ship.