The BPI-M2 Zero aka Banana Pi M2 Zero is apparently a re-production of Raspberry Pi Zero by a different company. But you need not to only consider the outlook and the positioning of the interfaces on the PCB. Though the design and dimensions of Banana Pi M2 Zero and Raspberry Pi Zero are identical still there are various differences. Talking about the Banana Pi M2 Zero, the board carries the Allwinner H2+ Cortex-A7 SoC and 512MB DDR3 SDRAM. Talking about the graphics processing capabilities, the BPI-M2 Zero has 600MHz Mali400MP2 GPU. The Banana Pi M2 Zero has an onboard ADIO WiFi AP6112 module which gives this board an edge over Banana Pi P2 Maker.
Not only that Banana Pi M2 Zero offers an onboard WiFi module but it also gives you the option to upgrade the WiFi module either with AP6181 or AP6335. The processing capabilities are good keeping in mind that it is the Zero version from Banana Pi. Keeping in mind the hardware specs, the price of Banana Pi M2 Zero is fairly competitive.