Only Panini have the NBA license, but apparently Leaf have the exclusive signing rights of Lillard, so it's a catch 22. Leaf has him in the Weber state uniform.
The prices of Leaf prior to certfied and prizm were going nuts, but are cooling considerably over the last 2 weeks. But all of that may change in time, and swing back in favour of the signed cards.
I personally think it will be a balance of the two, everyone wants to see him in official TBlazers gear, but they also want his autographs from his rookie year.
In time Panini may get his signature, which means the Leaf market will have its bottom drop out. If they dont however, Leaf stays strong.
And all of this is based on if he continues to be the frontrunner for the ROTY award.