Physical Dimensions & Thickness: The AYN Odin 2 Mini has a horizontal bar chassis measuring 198 × 85.8 × 19.5 mm, while the Valve Steam Deck OLED uses a horizontal bar chassis measuring 298 × 117 × 50 mm. In width, the AYN Odin 2 Mini is 100 mm (33.6%) narrower than the Valve Steam Deck OLED. In height, the AYN Odin 2 Mini is 31.2 mm (26.7%) shorter than the Valve Steam Deck OLED. In chassis thickness (depth), the AYN Odin 2 Mini is 30.5 mm (61%) slimmer than the Valve Steam Deck OLED (19.5 mm vs 50 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the AYN Odin 2 Mini occupies 16,988 mm² (169.9 cm²), compared to 34,866 mm² (348.7 cm²) for the Valve Steam Deck OLED—a footprint difference of 17,878 mm² (51.3%). On the scale, the AYN Odin 2 Mini weighs 320g versus 640g for the Valve Steam Deck OLED, representing a 320g (50%) weight difference (AYN Odin 2 Mini 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 Mini's 5" (16:9) panel yields a 4.09" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)), while the Valve Steam Deck OLED's 7.4" (16:10) panel yields a 6.54" effective diagonal (83% active screen area with vertical pillarbox bars on the sides (native 16:10)). This gives the Valve Steam Deck OLED a 2.45" larger active 4:3 diagonal (156% more active display area). For 16:9 widescreen content (PSP, Switch, streaming), the AYN Odin 2 Mini delivers a 5" effective diagonal (100% screen usage) versus 7.2" (90% screen usage) on the Valve Steam Deck OLED, making the Valve Steam Deck OLED larger by 2.2" (+107.3% active 16:9 area).
