Nope... the Orange Pi is a totally different critter than the Raspberry Pi.
They use different chipsets and I never could get the OS for RPi to work as it has to be compiled for the chipset in use due to being an SBC form factor. Due to space constraints, they try to optimize the OS load for the individual boards.
The Orange Pi is a cheaper option than a Raspberry Pi, especially in the recent past because the Raspberry Pi 4 was very hard to get at a reasonable price, so those other boards started getting used quite a bit.
The RPi 4 uses a Broadcom BCM2711 SoC chip, and the Orange Pi 3 LTS uses a Allwinner H6 SoC, the Orange Pi 4 uses a Rockchip RK3399, and the Orange Pi 5 uses Rockchip RK3588S. Each Orange Pi 4 has it's own OS rolled out by Orange for the device as they aren't interchangeable.
If the OS is on the SD card of the Orange Pi device, you should be able to use Balena Etcher to clone your SD card... but it would probably be better just to get a new SD card and use Balena Etcher to install StellarMate OS on it. I doubt that the OS is installed on the onboard eMMC flash (which on most won't have the storage capacity).

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