$50 ODROID-C4 Raspberry Pi 4 Competitor Combines Amlogic S905X3 SoC with 4GB RAM [cnx-software.com]
Hardkernel has just launched an update to its ODROID-C2 board [cnx-software.com], with ODROID-C4 SBC equipped with a 2.0 GHz Amlogic S905X3 quad-core Cortex-A55 processor combined with up to 4GB RAM, four USB 3.0 ports, Gigabit Ethernet, HDMI 2.0 video output, and the usual 40-pin I/O header.
That makes it a worthy competitor to Raspberry Pi 4 with 4GB RAM, especially since it supports Ubuntu 20.04, CoreELEC, Android 9, and LineageOS operating systems, and comes with a proper heatsink for cooling for just $50 plus shipping [hardkernel.com].
[...] Besides benchmarks and power consumption, the boards also differ in terms of features. For example, Raspberry Pi 4 offers dual HDMI output and built-in WiFi and Bluetooth, while ODROID-C4 comes with a single HDMI port, and WiFi/Bt is optional via a USB dongle. On the other hand, ODROID-C4 comes with four USB 3.0 ports, and offers support for eMMC flash module, while RPi 4 features 2x USB 3.0 + 2x USB 2.0 ports, and does not offer an eMMC option.
ODROID [wikipedia.org].
See also: Raspberry Pi 4 vs ODROID-C4 Features Comparison [cnx-software.com]
Also at Notebookcheck [notebookcheck.net] and LinuxGizmos [linuxgizmos.com].