Two rulebooks titled Crazy Eights may use different opening cards and drawing procedures. A clear table chooses a complete package. Having wild eights alone does not determine all the other rules.
In this guide
Reported differences
Pagat describes five-card hands, seven with two players, and a starting eight for which the dealer names the suit. It records additional action cards and alternative names including Switch and Mau-Mau. This is a separate account from the named Bicycle baseline, not a reason to combine every option.
Further reading: John McLeod / Pagat: Crazy Eights and reported variants
Drawing is a separate rule decision
Our example stock of diamonds 2, hearts 5 and clubs 6 on clubs king shows the difference clearly. Drawing until playable reaches the third card. A draw-one rule ends the same turn sooner when that card does not fit. Hand size, round duration and information from drawing all change.
Related does not mean identical
A Mau-Mau jack, Crazy Eights eight and Switch ace can perform the same role despite having different ranks. That does not make all other ranks equivalent. An eight skips instead in our Mau-Mau and Switch examples. This is why each game needs its own rule card.
A compact rule card
Record deck, hand size, initial eights, drawing, extra actions and round scoring. Specify an empty stock and a fully blocked game too. If you practise a simplified round without scoring, label that as your choice. A named scoring rule is not erased just because two games share a title.