Physical Dimensions & Thickness: The Miyoo Mini Plus has a vertical (game boy style) chassis measuring 78.5 × 108 × 22.3 mm, while the Retroid Pocket 5 uses a horizontal bar chassis measuring 199.2 × 78.5 × 15.6 mm. In width, the Miyoo Mini Plus is 120.7 mm (60.6%) narrower than the Retroid Pocket 5. In height, the Miyoo Mini Plus is 29.5 mm (37.6%) taller than the Retroid Pocket 5. In chassis thickness (depth), the Miyoo Mini Plus is 6.7 mm (42.9%) thicker than the Retroid Pocket 5 (22.3 mm vs 15.6 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the Miyoo Mini Plus occupies 8,478 mm² (84.8 cm²), compared to 15,637 mm² (156.4 cm²) for the Retroid Pocket 5—a footprint difference of 7,159 mm² (45.8%). On the scale, the Miyoo Mini Plus weighs 162g versus 280g for the Retroid Pocket 5, representing a 118g (42.1%) weight difference (Miyoo Mini Plus is lighter).
4:3 vs 16:9 Effective Viewable Screen Size: For classic 4:3 retro games (PS1, SNES, N64, Dreamcast), the Miyoo Mini Plus's 3.5" (4:3) panel yields a 3.5" effective diagonal (100% full screen without black bars (native 4:3)), while the Retroid Pocket 5's 5.5" (16:9) panel yields a 4.49" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)). This gives the Retroid Pocket 5 a 0.99" larger active 4:3 diagonal (64.8% more active display area). For 16:9 widescreen content (PSP, Switch, streaming), the Miyoo Mini Plus delivers a 3.21" effective diagonal (75% screen usage) versus 5.5" (100% screen usage) on the Retroid Pocket 5, making the Retroid Pocket 5 larger by 2.29" (+193.1% active 16:9 area).