The Leafstorm does use G-10. G-10 has dyes added to it to make it opaque. G-11 can also be dyed to be opaque. The two material basically have the same chemical makeup and are very similar, but there are differences. Wilkins used G-11 on his custom Leafstorm, but the Spyderco version does use G-10.
Here are some statements from JJ Orly. A company that produces these two types of materials.
G10 FR4 laminate grades are produced by inserting continuous glass woven fabric impregnated with an epoxy resin binder while forming the sheet under high pressure. This material is used extensively in the electronics industry because its water absorption is extremely minimal and the G10 line of materials is not electrically conductive. The G10 FR4 is most commonly used in PCB (Printed Circuit Boards) applications. G10 exhibits superior mechanical and dimensional stability and doesn't shrink. Temperature ratings of 180 degrees C. In addition to these properties, G10/FR4 has excellent dielectric loss properties, and great electrical strength. The difference between Grades G10 and FR4 is that FR4 is a fire retardant grade of G10. FR4 (also known as Garolite) can be substituted where G10 is specified; G10 can never be substituted for FR4.
G11- is an electrical-grade, dielectric epoxy fiberglass laminate epoxy resin system combined with a glass fabric substrate. The G11 material is Stronger and has a higher temperature rating than the FR4 material. the G-11 certifies to Mil-I-24768/3 GEB; G11 certifies to Mil-I-24768/28 GEB-F. G11 is a versatile material due to several mechanical and electrical properties; it is less reactive at high frequencies, absorbs less moisture, has greater strength and stiffness, and is highly flame resistant. G-11 material is used in applications where a good dielectric strength is needed plus the added value of the Fire retardency. Used in Power Plants, Buss Bars, Electrical generation units. G11 is available in sheets. MAX OPERATING TEMPERATURE 345° F.
As you can see they are very similar, but there are slight differences. Here's the link to JJ Orly.
http://www.jjorly.com/ There are alot of interesting materials they sell there. Hope this helps.