The MD-2 Mega distortion takes the bottom-heavy distortion sounds heard in today's new-school metal and pushes it to the extreme. The secret is a special dual-stage distortion circuit with an added gain boost-plus new Bottom and Tone controls--for crushing distortion with massive low end. Take your distortion into the future with the MD-2.
The OD9 uses the OD-850 pcb and most of the enclosures are repainted TS9 and SD9 cases, hence it's literally built of leftovers. Produced in extremely small quantities, never found its way to the official Ibanez catalogs. Rumor has it that all OD9 were built for the French market only. The fact that the owner's manual isn't trillingual (English, German, French) as the rest of the 9-series manuals but French only, does attest that.