Hello! I have had most of them before (Most sunsparklers tend to be hylotelepheniums) -- I do not currently own much because I did not move much of my clumping hylos.
To answer your question:
Hylos (especially purples, such as sunsparklers) are hard to identify because they have subtle differences
'Wildfire' is variegated -- but you might own the reverted version as with hylos. 'Firecracker' is not variegated.
Wildfire is much more red and if you were to pluck a leaf off, it would probably be a solid red/vvermillion (assuming it is reverted). If not, the two sides would be light pink/cream/white. 'Firecracker' on the other hand is not variegated, but has bi-colored leavves. If you were to pluck a leaf, it would have a blue/blue-purple area closer to the stem, and redder/purple/violet coloring on the outside, away from the stem.
If possible, could you send a picture of a leaf(s) from each plant you want to identify, and a full picture?
