I have been out of the Loomis loop for sometime.. So I can't tell you. They are very secretive about what information they let out... ??
I don't know for sure what the exact modulus make-up is, so much more is involved in a good quality blank than a modulus count. Look in Cabelas and you'll find 89 million mod. blanks... but I wouldn't ever fish them.
There are dozens of people here who have fished GL3 and then Rainshadow blanks.. they might be able to give us some insight on what they feel?