Will be primarily used for gaming, which would be best?
They are TV's so doubt any good for proper or average level gaming.
That said on my 2021 QN95A with the XBox update and a XBox controller isnt bad.
The QN90A seems to be the only one of these two with free sync support, this enables smoother animations which are stutter free. https://www.samsung.com/freesync
More expensive but the QN95B is one of the most highly rated in some reviews. https://www.t3.com/features/best-gaming-tv
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .