Swinger rarity...

I see lots of 4 door ones listed for sale in my area, have one as a parts car ourselves. I think the more rare version is the Plymouth valiant 2 door. My son daily drives one that I bought for him. And almost 100% of people that see it call it a dart. Then if we correct them and say its a valiant. There standard answer is. "Oh, isn't it the same thing" and "my parents had a dart swinger when I was a kid" go to the mopar nationals and 99 out of a 100 are swinger darts and 1 is a valiant. Maybe 98/2