The Core i7-3610QM is the more powerful CPU by far. There is no contest.
Regarding the integrated graphic core, the Intel HD 4000 is apparently more powerful than AMD's Radeon HD 7640G. According to the following review of the Radeon HD 7640G, the Intel HD 4000 beats the Radeon HD 7640G in 6 out of 9 games.
http
/www.notebookcheck.net/AMD-Radeon-HD-7640G.69836.0.html