I always chuckle when reading comparable. You can compare any two things to find out they are either the same, or very similar, or very different. Cost of aircraft carrier is comparable to cost of lifeboat: $100m is more when compared to $10,000. People expect "similar" when reading "comparable" but there is a loophole.
When spreading the word on Model X pricing, I first mention that the "base model" battery pack is no longer available. Next thing to mention is that the RWD equipped model will share 60% parts with a Model S, including battery pack and drive train. People can figure out the rest by them selves.