If you go on to compare the number of candidates per seat, then AILET is considerably more difficult than CLAT. 

However, in great contrast, there were about 18 applicants competing for one seat in NLU, while in the case of AILET, there were almost 203 applicants competing for an individual seat in NLU, Delhi. If compared to CLAT, AILET is somewhat higher in the case of the difficulty level.

It is important to know that most of the students who go on to apply for AILET also apply for CLAT. But because NLU Delhi is amongst the top 5 national law universities of India, it is intensely difficult to get shortlisted.