Physical Dimensions & Thickness: The ASUS ROG Ally X has a horizontal bar chassis measuring 280.2 × 114 × 36.9 mm, while the Retroid Pocket 4 Pro uses a horizontal bar chassis measuring 184.8 × 82.6 × 15.8 mm. In width, the ASUS ROG Ally X is 95.4 mm (51.6%) wider than the Retroid Pocket 4 Pro. In height, the ASUS ROG Ally X is 31.4 mm (38%) taller than the Retroid Pocket 4 Pro. In chassis thickness (depth), the ASUS ROG Ally X is 21.1 mm (133.5%) thicker than the Retroid Pocket 4 Pro (36.9 mm vs 15.8 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the ASUS ROG Ally X occupies 31,943 mm² (319.4 cm²), compared to 15,264 mm² (152.6 cm²) for the Retroid Pocket 4 Pro—a footprint difference of 16,679 mm² (109.3%). On the scale, the ASUS ROG Ally X weighs 678g versus 261g for the Retroid Pocket 4 Pro, representing a 417g (159.8%) weight difference (Retroid Pocket 4 Pro 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 4 Pro's 4.7" (16:9) panel yields a 3.84" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)). This gives the ASUS ROG Ally X a 1.88" larger active 4:3 diagonal (121.8% 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 4.7" (100% screen usage) on the Retroid Pocket 4 Pro, making the ASUS ROG Ally X larger by 2.3" (+121.8% active 16:9 area).
