Physical Dimensions & Thickness: The ASUS ROG Ally X has a horizontal bar chassis measuring 280.2 × 114 × 36.9 mm, while the Retroid Pocket 2S uses a horizontal bar chassis measuring 155 × 80.6 × 16 mm. In width, the ASUS ROG Ally X is 125.2 mm (80.8%) wider than the Retroid Pocket 2S. In height, the ASUS ROG Ally X is 33.4 mm (41.4%) taller than the Retroid Pocket 2S. In chassis thickness (depth), the ASUS ROG Ally X is 20.9 mm (130.6%) thicker than the Retroid Pocket 2S (36.9 mm vs 16 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the ASUS ROG Ally X occupies 31,943 mm² (319.4 cm²), compared to 12,493 mm² (124.9 cm²) for the Retroid Pocket 2S—a footprint difference of 19,450 mm² (155.7%). On the scale, the ASUS ROG Ally X weighs 678g versus 200g for the Retroid Pocket 2S, representing a 478g (239%) weight difference (Retroid Pocket 2S 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 Retroid Pocket 2S's 3.5" (4:3) panel yields a 3.5" effective diagonal (100% full screen without black bars (native 4:3)). This gives the ASUS ROG Ally X a 2.22" larger active 4:3 diagonal (167% 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 3.21" (75% screen usage) on the Retroid Pocket 2S, making the ASUS ROG Ally X larger by 3.79" (+374.8% active 16:9 area).
