Yes, the set I have says the same- Romanov Arms and it is very similiar if not the same. I will have to dig it out of my files to be sure though. I have a few books on Romanov hearldry and they were were extremely elaborate, depending on the ocaission they were used for Coronation, funeral ,wedding and births being the most. The State arms were a bit more restrained however.
I know the heir had his own arms, but I will not swear by the GDs. As far as I know, they had no separate titles [ like Princess of Novgorod or Kiev] that would actually warrant them. Again, I could be wrong as well here. Someone with more knowledge on the topic will have to tell us.
Ceremonial Cyrilic can be a bit difficult to translate so it is not uncommon to be mistaken about these things unless one is well versed- which I certainly am not!