There are tons of features which have been upgraded in note 4,which u cant see in note 3 .note 3 has 386ppi whereas note 4 has 515ppi,pics would be more than crystal clear,16mp camera,quad hd super AMOLED display,the fingerprint scanner has been improved i.e you can swipe ur finger as u like, still it will recognise ur fingerprint ,the Svoice has seen a drastic improvement and it is quick as siri(voice recognition in iphone),the s pen sensitivity of note 4 is twice as that of the sensitivity of note 3 ,so u can write smoothly as u r writing in paper,the front cam is 3.7 mp and it has wide angle with 1080p video recording whereas the rear cam can capture videos in 4k resolution as seen in DSLR cameras, u can also see a video i youtube"50 reasons why galaxy note 4 is better than iphone 6 plus"In my view its not just a phone its a class apart and i wouldnt bother whether it runs on a 64 bit or a 32 bit.