AP60 is a much safer bet because you know what dac and amp parts your getting, while the MROBO is a complete unknown and realistically there is no way it is using as good internals as AP60, otherwise they would have mentioned the parts. Also the SNR specs are a good indication, the MROBO is 99dB, while the AP60 is 109dB. I would get the AP60.
Also check out the $26 Walnut v2, I would go for this over the others players personally, it is more powerful and will actually sound more punchy than any of these other players because it uses bigger capacitors and a high voltage opamp driven output, plus it uses analog volume control, much more satisfying to use than digital volume (and imo better sounding).