I don't think it would matter, but I could be wrong. The only difference I think aftermarket cards has is just the heatsink/fans/cooling method (so better overclocking abilities). But with my underclock/undervolt settings, the reference cooler is already keeping it cool even in a hot garage style and I'm not trying to overclock.
I believe the reason why most people would want the aftermarket cards is just for better cooling and overclocking ability and overclocking=more power usage. So since my main goal is to reduce power usage and since I'm running on 110v, I can fit 2 rigs on 1 outlet without tripping the circuit breakers.
Our residential home has a 15amp circuit breaker, so if I overclock for maximum hashrate, it could run to around 1000 watts per rig. And if I place 2 rigs on 1 outlet, it would definitely trip the circuit breaker since it would be 2000+ watts.
that is the reason I buy cheap XFX R9 390 cards and under volt and under clock to get the best efficiency.