both the coachings are equally good for cracking NEET AIIMS or JIPMER .
These coachings just provide support to the students at the end the hard work of the student is the thing that matters
When i was preparing for NEET first i took coaching from Aakash South Ext. in 11th and 12th and then i took coaching from Allen (Samyak ) Kota. Both the tym i got approximately same marks i.e. around 460ish .
So everything depends on your hardwork as every year both the coachings are giving top rankers.... So we cant compare
Best of luck .... work hard from your side and trust me you will crack the medical exams