If the cards are that different, I would keep them as separate files. This will make it easier to make changes to limited parts of the cards, and will maybe even encourage you to copy a template file for a slightly (but enough) different new card.
As switching to a different card means a reload (I guess), keeping the different cards as different templates makes sense.
In reply to Re^3: Ordering Template cards
by Corion
in thread Ordering Template cards
by Bod
| For: | Use: | ||
| & | & | ||
| < | < | ||
| > | > | ||
| [ | [ | ||
| ] | ] |