According to WikiDevi, there's 2 HW revisions of AX53, v1 is IPQ5018 (no support yet in kernel) and v2 is BCM6756 (dead end). So yes, it's hardware is different than AX55 (runs Lantiq) but there's no support yet and may never be; first the SoC needs support, then the device itself.but
EDIT: I accidentally mixed up AX53 with AX55, but according to Add support Mercusys mr70x v2 and Tp-link ax53/55 it's IPQ0518, so at least v1 of the HW revisions looks to be the same but we can only verify that if you open up your device (I can't find any internal photos of AX53). So the above point above support still stands. Also see Add support for TP-LINK AX55 V1 - #2 by slh