nope, the Epox 8k7A is not similar, it has only 2 DIMM sockets and the HP controller.
I think the 7DXR and the KG7 are closer, if you talk about features. The 7DXR has additionally the dual bios, the KG7 4 Dimm sockets. You need REGISTERED Ram for the 7DXR and K7G if you want to use all DIMM sockets. For the Epox un-registered RAM is enough, means you can probably use your existing DDR memory one.
In terms of performance: these AMD 761 + VIA Southbridge boards are almost identical, even the older A7M266 is still as good in most benchmarks than the newer ones. Don't expect any mircale, it's the same chipset.