Physical Dimensions & Thickness: The Anbernic RG28XX has a horizontal bar chassis measuring 125 × 56.5 × 16.5 mm, while the Retroid Pocket 6 uses a horizontal bar chassis measuring 205.5 × 80.5 × 17.2 mm. In width, the Anbernic RG28XX is 80.5 mm (39.2%) narrower than the Retroid Pocket 6. In height, the Anbernic RG28XX is 24 mm (29.8%) shorter than the Retroid Pocket 6. In chassis thickness (depth), the Anbernic RG28XX is 0.7 mm (4.1%) slimmer than the Retroid Pocket 6 (16.5 mm vs 17.2 mm).
Footprint Area & Weight: Calculating surface footprint (width × height), the Anbernic RG28XX occupies 7,063 mm² (70.6 cm²), compared to 16,543 mm² (165.4 cm²) for the Retroid Pocket 6—a footprint difference of 9,480 mm² (57.3%). On the scale, the Anbernic RG28XX weighs 123g versus 200g for the Retroid Pocket 6, representing a 77g (38.5%) 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 Retroid Pocket 6'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 6 a 1.66" larger active 4:3 diagonal (152.2% 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 5.5" (100% screen usage) on the Retroid Pocket 6, making the Retroid Pocket 6 larger by 2.9" (+348.3% active 16:9 area).