1. 12611 is also garib rath.
2. Comparison of garib rath with AC is not possible.
3. Mostly Comparison of two garib rath in different route is also not possible .
Overall Dynamics of the run of Naharlagun A.C. are completely different to run of 12611 . 12611 dont have 5 heavy weights Rajdhani behind it.
And...
more... I personally have observed that Chennai garib rath get precedence over AK Rajdhani.
Bandra Garib rath also enjoy terrific run.