I do think they look similar. The casting recreation of JD has a very upturned nose, which I don't see in Susan, but the probably newer sketches, it doesn't look at pronounced.
There are some rule outs that I see, but none are Susan.
JD has an estimated death of two weeks before she was found in 1982. It could be off, it could be Susan was alive/held onto for a few years, so it doesn't rule anything out, but interesting to know..
Some things that would be nice to know to help match: if JD had pierced ears and if Susan had any type of back injury. JD has a 'healed healed fracture in one vertebrae in the back'. Not sure what kind of injury that might be.
The problem is that Susan does not have any dentals, DNA or fingerprints entered, so it might be difficult to match.