It all comes down to preference & whether the drill will do all of the things you expect to do with it!
One answer is right in that your paying for the brand name rather than the product itself
My first battery drill was a Makita, only required the drill not the attachment's but it became too small for the work I was doing, so purchased a very expensive Dewalt for the task at hand. It did all I wanted of it, until the motor crapped out, had it replaced & next went a battery, followed by the charger And I got to thinking, why pay for expensive brands when a cheaper model will do all I want, so ended up buying a cheap Black & Decker for under $100 & also bought another, one in my work ute & the other in my workshop.For the price I originally paid for the De-Walt, I could have purchased six cheap Black & Decker drills Neither owes me anything if they crap out co's in today's world we have come to an age where if something craps out or breaks down we throw it away & get another!
Replacing broken or worn parts becomes far too expensive especially if you have to rely on a trained person to carry out your repairs, which is advisable these days as you normally get a warranty unless told otherwise.
So my best advise I can offer you is buy what you think or want the equipment to do, rather than paying for a particular brand! Even the best brands breakdown if abused or not used correctly!