Hello There. The Reason ( CardBus ) Cards are sold as PCMCIA is that; ( CardBus ) is the Newer PCMCIA Standard.
Here is a BreakeDown.
Type I and Type II PCMCIA Cards are 16-Bit Cards.
The Amiga 600's and Amiga 1200's have a type II PCMCIA Slot.
A type II Slot is Compatible with Type I and Type II Cards.
( CardBus ) Or Type III PCMCIA Card's are 32-Bit PCMCIA Cards.
If you were to get a Type II to Type III Adapter then you
would be able to use Type III ( CardBus ) cards in either
an Amiga-600 or An Amiga-1200.
Hope this helps you out.