From what i've read they are very similar, but the new street tuner doesn't allow for DPF/EGR deleting. Oh and it looks like the highest tune is 200hp vs the 180hp on the race tuners. I don't know how much the actual tunes vary between the two.
Side note, they (H&S) picked up a well known and respected tuner to write tunes for them. He used to tune EFI-Live but is strickly H&S now. I look forward to seeing some good tuning coming soon.
* The last time I looked I believe the highest hp tune for the street tuner was 120hp (ish) so it looks like their newest member is at work and doing a good job.
I hope they are able to do something with the race tunes as well.