Okeedokee:
1) No choil between heel of cutting edge and guard on the M17.
2) Slightly modified blade profile.
3) Cutting edge side of handle on M17 has index finger choil, vs memory bump mid handle on OG.
4) Tip on M17 is oriented approximately .5" closer to spine of blade than on OG, for better alignment with centerline of handle.
Everything else is the same. Same OAL, same ergonomics, same thickness and materials, etc.