Question: what is the difference between hd and wqhd?
Answer: While the FHD (Full HD) has 1,920 x 1,080 resolution (2,073,600 pixels in total), the WQHD (Wide Quad HD, or just QHD) has 2,560 x 1,440 resolution (3,686,400 pixels in total) with the same 5.1″ screen. Accordingly, the ppi of the WQHD (577 ppi) is much higher than that of the FHD (432 ppi).