The top 4 cards from what I have been told, do not really represent legitimate varieties as the printing/embossing is generated in the casino.
The Taj Logo sticker on the card in the second row
is issued as an admission pass to certain events. Most likely placed on the card by the player as it has nothing to do with the card.
The 50's sticker on the green card has been removed from another card and applied to the green card as well.
The 50's club sticker was not issued until after the green/aqua card was obsolete.
There does exist a gold version of the aqua/green card that was limited to 10,000 and was individually numbered.

The new variety card, specifically the one with the players picture on it is issued as both identification and also signifies club membership.
In this case the letter "B" preceeding the expiration date shows the player to be a member of the "Bengal Club" P= President's club M= Maharajah club.
As stated in the comments above, the varieties again are computer generated in the casino dependant on which machine issued them.