Personal note: I have and use Odroid -U2, -U3, -C, -C1, -C2, RPI2, RPI3, and a UDOO (original backer), mostly as micro-servers. I don't require much customization and as long as that remains true, I find them to be great machines.
The Odroids are definitely better hardware, but the story gets more complicated when the question of kernels (and the binary blobs needed for media) are updated to mainline. I've heard but not verified that the original Exynos CPUs in the Odroid-Ux are supported by mainline kernels.
The Allwinner chips in the Pines, Banana Pis, Orange Pis, etc. lack complete HW docs and need critical binary blobs (At least the Allwinner H8 has long needed a DRAM controller library blob, for example). If Allwinner were to clean up their documentation and make truly complete hardware docs available, then the overall product would be better than RPi. Until then, RPi support is so much better than their competitors that it overwhelms the otherwise obvious performance advantages.
Quoting from https://www.phoronix.com/scan....
However, the support isn't complete for the Allwinner A64 and is blocked in part by lack of proper documentation. Andre commented, "Due to a lack of official documentation and hardware availability this doesn't go any further at this moment."
The Allwinner A64 is comprised of the less-powerful Cortex-A53 cores, supports H.264/H.265 video decoding, and is widely talked about as being the "$5 ARM SoC." Hopefully this mainline kernel support will get figured out in time for the Pine A64 shipping.