Both the more centrist of their respective primaries, not likely to be perceived as a proxy for or against Trump.
Obviously much will depend on the overall sentiment for or against the party in charge in a state with a baseline GOP partisan lean, but Trump only won by 3.5% there.
I’m thinking Sinema can box McSally in. Paint herself as someone willing to reach across and get things done, even when it is a policy that began with Trump, but still a fighter against those things that Arizonians do not approve of, and make McSally either defend those things (to placate the Trump supporters who are not so sure she is pure enough) or come out against those things (and fail to placate the same group).