I'm not aware of Vallorbe diamond files, only their Icecut (laser cut) metal files.
Diamond 'files' or 'stones' are made much like sandpaper AFAIK, where the diamonds are adhered to a paper backing which is attached to flexible plastic (Moonflex) or rigid aluminum (Maplus). Additionally, I think, the Maplus diamond stones use a higher grade paper backing.
Personally, I like the Maplus stones better than the Moonflexes as I get a better 'feedback/feel' due to more rigidity. The flexibility of the Moonflexes is really very slight and in a guide with full support (ie, T4B Razor or Xact), I can't feel the difference between them and the Maplus. I do feel the difference using them by hand or with metal guides with a 1" wide spring clamp. Note, you should never bear down hard with stones and files, but let the tool do the cutting.
The Moonflexes have more surface area of cutting diamonds than the Maplus.
Here's a photo of Maplus & Moonflex diamond stones:
Additionally, from DiaFace
Makers of Moonflex in Italy):
|The DIAFACE® MOONFLEX® diamond files should be used lubricated, spraying on them a solution of 50% water and 50% denatured alcohol. In emergency, on the ski slope, the snow could be enough to keep them lubricated. The preparation of the edge should be made as follows:
· Create the edge with DIAFACE® MOONFLEX® 100 grit (black) using then the various grits in sequence for obtaining the mirror finishing (200-400-600-1500). Three or four passes of each grit, without exerting pressure, are enough to obtain a perfect result.
· If you wish to lap the edge use DIAFACE® MOONFLEX® 1500/3000 Resin.
· An adequate instrument is needed to keep the tool stable and perfectly flat (it is inadvisable the free hand use of the tool).
· DIAFACE® MOONFLEX® can be used for the preparation and finishing of the side edge as well as for the tuning.
· After use, clean the DIAFACE® MOONFLEX® file with the solution of water and alcohol using a small bronze brush.
The correct use of DIAFACE® MOONFLEX® allows the preparation of hundreds of perfect edges.