Aimed at those just starting out on their learning journey, both 61-key instruments feature the Yamaha Education Suite which enables students to teach themselves piano.
As you’d expect, a range of other features include varied auto-accompaniment styles (100/136) and sounds (385/550), USB to HOST connectivity for using the keyboard with a PC or tablet, and audio line input. The PSR-E343 has touch sensitive keys, which implies that (disappointingly) the PSR-E243 has fixed velocity keys.
Both are priced at around $270 RRP. Compare PSR-E243 with PSR-E343.