Physical Dimensions & Thickness: The AYN Odin 2 has a horizontal bar chassis measuring 225 × 98 × 17 mm, while the AYN Odin 3 uses a horizontal bar chassis measuring 224.8 × 87.5 × 16.6 mm. In width, the AYN Odin 2 is 0.2 mm (0.1%) wider than the AYN Odin 3. In height, the AYN Odin 2 is 10.5 mm (12%) taller than the AYN Odin 3. In chassis thickness (depth), the AYN Odin 2 is 0.4 mm (2.4%) thicker than the AYN Odin 3 (17 mm vs 16.6 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the AYN Odin 2 occupies 22,050 mm² (220.5 cm²), compared to 19,670 mm² (196.7 cm²) for the AYN Odin 3—a footprint difference of 2,380 mm² (12.1%). On the scale, the AYN Odin 2 weighs 420g versus 390g for the AYN Odin 3, representing a 30g (7.7%) weight difference (AYN Odin 3 is lighter).
4:3 vs 16:9 Effective Viewable Screen Size: For classic 4:3 retro games (PS1, SNES, N64, Dreamcast), the AYN Odin 2's 6" (16:9) panel yields a 4.9" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)), while the AYN Odin 3's 6" (16:9) panel yields a 4.9" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)). Both devices provide the exact same viewable 4:3 image size. For 16:9 widescreen content (PSP, Switch, streaming), the AYN Odin 2 delivers a 6" effective diagonal (100% screen usage) versus 6" (100% screen usage) on the AYN Odin 3.