What's the difference between nugget ice and bullet ice makers?

Bullet (hollow cube) machines like the Frigidaire EFIC117, Silonn and the cheaper EUHOMY are fast and inexpensive, but reviewers note the hollow cubes melt quickly and aren't the chewable 'Sonic' ice many shoppers want. Nugget makers (Kismile, GoveeLife, GE Opal) produce the soft, crunchable pellet ice, but cost more, run noisier and need regular descaling according to specialist-community threads.