It was in a notice sent out to dealers a couple of weeks ago - but I'm sorry, I don't remember the date that the change was to take place.
Keep in mind that as you move farther East dealers are more likely to stock spas. Because of this, they may want to sell the in-stock tubs prior to brininging in new, and so what they said may very well be true in thier store.
There certainly is nothing wrong with either heater and they are covered by the same warranty.