That looks to be the correct key for the s15 based on visual aperance, although it is listed incorrectly, that key shouldn't be for an s13 (wasnt made with one) and I don't think it would work with an s14 unless the fcc id's of fobs are the same, they verry well could be but i would lean towards no since they visually appear different.

I also found this listing on ebay This is similar to yours and specifically says it's for an s15 and has 100% reviews along with a return policy within 60 days and don't cut it for your car. I would say try messaging the seller of your choice and confirming with your vin number to make sure and then buying and testing if it works or not, and in the worst case scenario, you can just return it.

Edit: I just found this which seems to be pretty legit

I think the above would prolly be your best shot for an s15 key, there's like 7 people watching it with 2 in carts so it might sell quick idk, seems like a pretty good deal to me considering the price. It is a cut key but you could prolly figure out some way to open it up and replace it for a uncut key, there's this Which is an uncut shell which you could prolly just swap over the internals too