Typically speaking, SAFEs only differ in terms of: (i) the amount invested; (ii) whether there is a discount, cap, or both; and (iii) the amount of the discount/cap/both. If you are doing a round of different SAFEs, you might have a minimum amount of investment per SAFE and a maximum amount for the entire round.
You could put any of that into a term sheet. But you don't need to.
