Odyssey 2 game variations question

[+atari2600land]

I have a copy of Blackjack! for the Odyssey² that I've had. I just bought a label variation where the label says "Las Vegas Blackjack!" instead of just "Blackjack!" (I'm a completist). I was just wondering which is rarer: The "Blackjack!" label or the "Las Vegas Blackjack!" one?