If I was in the market today, I'd go for the Pro. For me the dollar difference isn't that huge. As an early adopter and have the "adv" or standard. I've yet to turn on standard CA and don't believe I'd be using RS very much at all based on how I use my drones. I can't recall, the exact speed, but with the RS I think the speed is limited to like 12 mph.. So good for following someone running/hiking, not so good for thing I'd want it for...
I've got a P4 and that front-looking CA works very well, yet I've never used in my real world "shoots".
So, I was all set to buy the RS module for the H when it came out when I first got my H, But right now, while I'd still like to get it, its way low on my list of "priorities" and things to purchase...