The higher res screen (1920x1200), 2048 pressure point stylus (probably why they removed the trackpoint), µUSB slot and lower price would also be nice additions over the GPD Pocket, although I have to say that something smells fishy here... The OneMix apparently has an Intel Atom x5-Z8350 processor. I ran a comparison between that and the x7-Z8750 of the GPD Pocket and noticed that the x5-Z8350 only supports up to 2GB RAM (they claim it has 8GB) and a maximum resolution of 1920x1080. Unless I'm missing something and have not properly understood the processor specs, the OneMix is probably vapourware.
Source: https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf 8.2.1 System Memory Technology Supported The system memory controller supports the following DDR3L-RS/LPD DR3 Data Transfer Rates, DRAM Device Technologies: • DDR3L-RS/LPDDR3 Data Transfer Rates: 1600MT/s (12.8 GB/s per channel). • LPDDR3 (1.2V DRAM VDDQ) • DDR3L-RS (1.35V DRAM interface I/Os) • DDR3L-RS DRAM Device Technology — Standard 2 Gb technologies and addressing — Read latency 5, 6, 7, 8, 9, 10, 11, 12, 13 — Write latency 3, 4, 5, 6, 7, 8 • LPDDR3 DRAM Device Technology — x64, 253 ball LPDDR3 DRAM package — 8 GB (2 rank per channel) package density — Standard 2 Gb, 4 Gb and 8 Gb DR AM technologies and addressing — Read latency 5, 6, 7, 8, 9, 10, 11, 12, 13 — Write latency 3, 4, 5, 6, 7, 8 • Supports Trunk Clock Gating • ECC supports 64-bit data bus on DDR3L-RS single channel • Supports early SR exit • Supports slow power down • Supports CA tri-state when not driving a valid command