Physical Dimensions & Thickness: The ASUS ROG Ally X has a horizontal bar chassis measuring 280.2 × 114 × 36.9 mm, while the AYN Odin 2 Mini uses a horizontal bar chassis measuring 198 × 85.8 × 19.5 mm. In width, the ASUS ROG Ally X is 82.2 mm (41.5%) wider than the AYN Odin 2 Mini. In height, the ASUS ROG Ally X is 28.2 mm (32.9%) taller than the AYN Odin 2 Mini. In chassis thickness (depth), the ASUS ROG Ally X is 17.4 mm (89.2%) thicker than the AYN Odin 2 Mini (36.9 mm vs 19.5 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the ASUS ROG Ally X occupies 31,943 mm² (319.4 cm²), compared to 16,988 mm² (169.9 cm²) for the AYN Odin 2 Mini—a footprint difference of 14,955 mm² (88%). On the scale, the ASUS ROG Ally X weighs 678g versus 320g for the AYN Odin 2 Mini, representing a 358g (111.9%) 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 ASUS ROG Ally X's 7" (16:9) panel yields a 5.72" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)), while 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)). This gives the ASUS ROG Ally X a 1.63" larger active 4:3 diagonal (96% more active display area). For 16:9 widescreen content (PSP, Switch, streaming), the ASUS ROG Ally X delivers a 7" effective diagonal (100% screen usage) versus 5" (100% screen usage) on the AYN Odin 2 Mini, making the ASUS ROG Ally X larger by 2" (+96% active 16:9 area).