According to the Korea Times, the Galaxy Note 3 will feature a 6.3 inch display compared to the 5.5 inch display which the Galaxy Note 2 sports.
It seems that it is going to integrate the newly announced Octa processor into it and this would make the phone/tablet the first mobile device to run on a 8 core processor and also beating Huawei’s Ascend Mate for the largest screen on a phablet.