Part of the Furniture
Only if the two APs overlap a lot and not placed properly. Two RT-AC68U at -60dBm apart (whatever distance this translates to in the specific environment) will beat any other single AP in range, AX or BE. I read stories around how 2x AC units were replaced with single AX unit, but this only tells me the AC units were not placed in optimal locations. One central AP with better range may cover the house, but what used to be outdoor range will be lost.
Can't beat Wi-Fi physics with imagination.
Not saying AX is a magic pill to overcome wifi physics, just that radios and drivers have improved a lot since the 68U, and along with rethinking placement, one could be enough. Or it may not be, obviously without knowing anything about OPs layout and size, no way to say.
Just always worth considering, I liken it to getting a 50 year old furnace replaced and they just toss in one of the same size, when in reality they're a ton more efficient now and it should have been sized down to run optimally.