RD Sharma is far better than ML Khanna in theory,which in my opinion is most important.Most of the students are afraid/weak in mathematics because they don't go through theory part.

Understanding of theory + IQ + Skill = Mathemagician

IQ=God Gift + Hardwork

Intelligent Hardwork*IQ=Success (for all values of IQ>0 ;))

RD Sharma can make you skilled,Then go for IA Maron and SL LONEY (Awesome Books)

So my vote goes to RD Sharma