Is Linux support for Intel N150 (x86) as good as Linux support for RPi (Arm SoC N of M)?

Generalist x86 is usually better supported than specialist Arm, but newer drivers (e.g. NICs) may take time to mature.

There's more to the CPU on a SoC.

I run Arch on a Radxa X4 and it’s fine, no driver issues even with the WiFi chipset.