Nothing wrong with either. Both make several different levels of guns.
IF you are looking at an entry level sub-$600 AR, there are about a dozen different ones to choose from. Rugar AR556, smith and wesson MP15 sport, the delton, DPMS has a few entry level, CMMG, core-15, bushmaster, windham, etc etc etc.
IMO, there really isnt much difference in any of the entry level guns. They are all carbine length DI gas systems, nothing fancy about the barrel, furniture, etc. About the same as you can get with different engravings to designate a brand.
When you start getting into upper level stuff, mid and rifle lengths, different barrels and chrome lining or nitrided , piston operated, etc. Then there becomes some differences. But for entry level, dont much matter.