Unfortunately, this is a highly subjective call. The short answer is: Yes, he's within the margin of error.
The problem with the sketch is that you can find very vocal camps who will insist the sketch looks like whoever their preferred suspect is, and nothing like anyone else.
Ultimately the sketch has to be treated as generally suggestive but not proof of any particular thing. Police sketches are useful tools for directing an investigation, but they're not rocket science and they won't stand up against a direct identification in court of law.
Interestingly, a San Antonio online newspaper showed Elliott a picture of Jose Padilla and asked if it was JD2. Elliott referred them to his lawyer and refused to answer.