Physical Dimensions & Thickness: The Anbernic RG28XX has a horizontal bar chassis measuring 125 × 56.5 × 16.5 mm, while the TrimUI Smart Pro uses a horizontal bar chassis measuring 188 × 80 × 17 mm. In width, the Anbernic RG28XX is 63 mm (33.5%) narrower than the TrimUI Smart Pro. In height, the Anbernic RG28XX is 23.5 mm (29.4%) shorter than the TrimUI Smart Pro. In chassis thickness (depth), the Anbernic RG28XX is 0.5 mm (2.9%) slimmer than the TrimUI Smart Pro (16.5 mm vs 17 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the Anbernic RG28XX occupies 7,063 mm² (70.6 cm²), compared to 15,040 mm² (150.4 cm²) for the TrimUI Smart Pro—a footprint difference of 7,977 mm² (53%). On the scale, the Anbernic RG28XX weighs 123g versus 231g for the TrimUI Smart Pro, representing a 108g (46.8%) weight difference (Anbernic RG28XX is lighter).
4:3 vs 16:9 Effective Viewable Screen Size: For classic 4:3 retro games (PS1, SNES, N64, Dreamcast), the Anbernic RG28XX's 2.83" (4:3) panel yields a 2.83" effective diagonal (100% full screen without black bars (native 4:3)), while the TrimUI Smart Pro's 4.96" (16:9) panel yields a 4.05" effective diagonal (75% active screen area with vertical pillarbox bars on the sides (native 16:9)). This gives the TrimUI Smart Pro a 1.22" larger active 4:3 diagonal (105.1% more active display area). For 16:9 widescreen content (PSP, Switch, streaming), the Anbernic RG28XX delivers a 2.6" effective diagonal (75% screen usage) versus 4.96" (100% screen usage) on the TrimUI Smart Pro, making the TrimUI Smart Pro larger by 2.36" (+264.6% active 16:9 area).