Unfortunately all things are not equal, and I'm betting with some of the slower powders coming out the 195 will hit 2800-2900fps with 7RM LA rifles and 7WSM SA rifles, with long barrels that are throated long. I'd like to give RL33 a try, among others. The proof will be in the pudding, so we'll have to wait and see what is attainable in the real world, beyond our postulating and calculating
As far as wind drift advantage goes, it's easy to say that the 195 drifts 7" less than the 180 at 1000 yards in a 10mph wind, and that as long as you can call the wind with only a 20% error, that the two bullets will land within an inch or two of each other. What if the 195 lands on the diaphragm, and the 180 lands 1.5" behind the diaphragm? Better hope for a liver hit! Of course that is worst case scenario, but I'll take any advantage I can get. And what happens when there is a 14mph wind, gusting to 19mph, and the wind direction changes 3 times between you and the target? Your wind estimation error goes up, and the 195 will help mitigate any error more so than will the 180, and the advantage will start to add up as the wind gets more complicated than a simple 10mph constant full value push.