I couldn't get much info on these so I bought both and a 4g flash drive. Comparing the 2 I give the 791 the edge in sq. The 6900 has more EQ but I like the sound of the kenwood better. Searching through songs on both is easy. I like the 791 display better. The kenwood comes with the music editor that works great. Makes playlists and searching is great. It acts like an Ipod with all the search functions. The pioneer is easier to navigate the menus but the kenwood isnt bad once you know where everything is. On both decks I do have a small noise issue. The 6900 has almost a pink noise in between songs thats annoying, Its not bad when driving because of the road noise but sitting still its annoying. The 791 has a small pop noise while switching songs. None of those noises where present with my other decks. I will be keeping the 791 but will take it back to see if I can get rid of that pop noise. Now if Kenwood would put in more Eq and T/A I wouldnt look elsewhere.