I think he might be talking about the boilers on the Frigates in which case they do get used more on the East Coast but are still pretty foreign to most people, only a couple people are really familiar with them. Personally speaking I feel the small steam generators on the Frigates aren't much to get excited over as the boilers and steam system on the Frigates are pretty neglected (at least in comparison to the other systems). Usually only one works and often it is due to some jerry rigged repair (your experiences may vary, this is just what I have seen with my own eyes).
From a realistic standpoint you are only going to be posted to Frigates at this point, so the ship really doesn't matter too much, though if I had to choose, I would pick one that has been out of refit for a while, so you avoid the hassle of trying to get a ship up and running again and having to be retrained on the consoles when your ship gets refitted (examples on the East Coast would be ships like the Fredericton, Charlottetown, Montreal and somewhat the Halifax, which is more or less in its own category).
The big thing that matters is what coast you go to. Personally I would have rather stayed in Esquimalt then have moved to Halifax for the following reasons (this is after picking Halifax and now seeing what it is like). The PLD is better in Esquimalt, and as long as your not buying a house the rent isn't really that much more than Halifax area (most guys I have talked to on the West Coast use there PLD to pay for rent, on the East Coast PLD doesn't cover half your rent). It is also cheaper for groceries in Esquimalt than Halifax for whatever odd reason. The weather is also better in the West Coast (winter sucks in Halifax, snows, then it rains, then it freezes, then it snows again, and it repeats until the winter is over). This is just my experience others love living in Halifax area.