Conversation so far:
How were Drake's early mix tapes distributed?
Drake self-released his debut mixtape, Room for Improvement, in 2006.
How many copies sold?
The mixtape was released for sale only, and confirmed to have sold over 6,000 copies.
When did he create his next mix tape?
In 2007, he released his second mixtape, Comeback Season.

Question: Did it sell better than his first tape?
Self-contained rewrite: Did comeback season sell better than Drake's first tape Room for improvement??