It depends on the RF signals around. With clean Line-of-sight and no interference 802.11ac will outperform nv2.
It’s easy to prepare the setup to be able to switch between protocols.
Set the “station bridge” side to protocol “802.11 nstreme nv2” and prepare all security passwords.
On the “bridge” side then chose 802.11ac and check the registration for TX Rate, RX Rate and the CCQ. If CCQ is lower than 90% the signal is not clean and nv2 might help.
Otherwise try them all, and compare.
There is no need for WDS in this setup.