This is probably the ultimate question when trying to get a new e-reader and I have to say I can't decide either. I own both and use them for two different things. My nook is for the big books (ie ones that cost 7.99 or more) and I use my kindle, actually I have the fire, for cheaper books like free-3.99 and I also use it to use as a tablet. I have to say they both are very great. The only difference is the screen, you can have the special screen that looks like paper or the regular screen you get from a computer. I love both of these e-readers and would be so upset if I lost one. I would say just go test them out and see which you think best fits your needs. That's the only way to ever decide I have come to realize.