Physical Dimensions & Thickness: The Retroid Pocket 4 Pro has a horizontal bar chassis measuring 184.8 × 82.6 × 15.8 mm, while the TrimUI Brick uses a vertical (game boy style) chassis measuring 73.2 × 109.9 × 11.8 mm. In width, the Retroid Pocket 4 Pro is 111.6 mm (152.5%) wider than the TrimUI Brick. In height, the Retroid Pocket 4 Pro is 27.3 mm (24.8%) shorter than the TrimUI Brick. In chassis thickness (depth), the Retroid Pocket 4 Pro is 4 mm (33.9%) thicker than the TrimUI Brick (15.8 mm vs 11.8 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the Retroid Pocket 4 Pro occupies 15,264 mm² (152.6 cm²), compared to 8,045 mm² (80.5 cm²) for the TrimUI Brick—a footprint difference of 7,219 mm² (89.7%). On the scale, the Retroid Pocket 4 Pro weighs 261g versus 159g for the TrimUI Brick, representing a 102g (64.2%) weight difference (TrimUI Brick is lighter).
4:3 vs 16:9 Effective Viewable Screen Size: For classic 4:3 retro games (PS1, SNES, N64, Dreamcast), 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)), while the TrimUI Brick's 3.2" (4:3) panel yields a 3.2" effective diagonal (100% full screen without black bars (native 4:3)). This gives the Retroid Pocket 4 Pro a 0.64" larger active 4:3 diagonal (44% more active display area). For 16:9 widescreen content (PSP, Switch, streaming), the Retroid Pocket 4 Pro delivers a 4.7" effective diagonal (100% screen usage) versus 2.94" (75% screen usage) on the TrimUI Brick, making the Retroid Pocket 4 Pro larger by 1.76" (+156.1% active 16:9 area).
