I prefer the slightly newer 3410. It has a better button layout and added features such as web browser, picture editor and downloadable games (my grandma somehow has the long-lost first ever 3D Java game Munkiki's Castles on hers, which has been in daily use for 20 years). However, they are so similar that their later revisions only differed by the button placement and firmware (see Janus Cycle's video).