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 4 Pro uses a horizontal bar chassis measuring 184.8 × 82.6 × 15.8 mm. In width, the Miyoo Mini Plus is 106.3 mm (57.5%) narrower than the Retroid Pocket 4 Pro. In height, the Miyoo Mini Plus is 25.4 mm (30.8%) taller than the Retroid Pocket 4 Pro. In chassis thickness (depth), the Miyoo Mini Plus is 6.5 mm (41.1%) thicker than the Retroid Pocket 4 Pro (22.3 mm vs 15.8 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the Miyoo Mini Plus occupies 8,478 mm² (84.8 cm²), compared to 15,264 mm² (152.6 cm²) for the Retroid Pocket 4 Pro—a footprint difference of 6,786 mm² (44.5%). On the scale, the Miyoo Mini Plus weighs 162g versus 261g for the Retroid Pocket 4 Pro, representing a 99g (37.9%) 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 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 Retroid Pocket 4 Pro a 0.34" larger active 4:3 diagonal (20.4% 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 4.7" (100% screen usage) on the Retroid Pocket 4 Pro, making the Retroid Pocket 4 Pro larger by 1.49" (+114.1% active 16:9 area).
