No, it must be an original CSI card. Comm Slot II cards are designed for PCI based systems - the 6360, x400/x500 series systems as well as the TAM. CSI and CSII cards are not interchangeable, they are not electrically or physically compatible.
CSI cards that will work in your LC575 were used in LC/Performa 580s, LC/Performa/Quadra 630/640 series machines, as well as the Performa 52xx/53xx/62xx/63xx series (except 6360), so try and look for a card from any of those machines.