But in your photo, Harry is number 14 (with a Haro "werks" plate), where in the "unidome" photos, he is number 4 (with a "Stadium" plate). In your shots he is wearing Black and Red MXL gloves, where in Mark's photos, he is wearing white (JT Cloth?) gloves. But you are right, the locations do look eerily identical. Also, in your shots, Harry has "HARRY" on his right shoulder, where he does not in the other images.
I remember one time, in Super BMX, where someone wrote a caption that said "The unmistakable style of Mike Dominguez" except that it was Donovan Ritter. IDing photos was always the toughest part of the job.