What's the difference between FT80X and FT81X?

FT80x series (FT800 and FT801) support small size LCD displays like 2.8", 3.2"and 4.3", resolution up to 512x512 with 262K colors.

FT81x series is the second generation of touch display controller ICs with Embedded Video Engine (EVE), include FT810, FT811, FT812 and FT813. FT81x series provide increased resolution up to 800*600, with faster data transfer and image/video loading, and larger memory capacity in order to create better Human Machine Interfaces.