The MD1 is a new version of the MD that is slightly faster, flatter topped, and can take a little more power. The MD1 will hold as straight as an arrow for as far as you can throw it. 
 
Discmania C-line plastic is similar to Lucid by Dynamic Discs or Opto by Latitude 64. It is Discmania's most durable, translucent blend with good grip and stable performance.