It changes how easily or when you lose the backend but once it’s gone? It’s not much different

Are you saying that weight distribution has no impact on the way that a car spins?

Here’s a small snippet from wikipedia of all places

The disadvantage to a rear weight bias is that the car can become unstable and tend to oversteer, especially when decelerating (whether braking or lifting off the throttle; see lift-off oversteer). When this happens, rotational inertia dictates that the added weight away from the axis of rotation (generally the steering wheels) will be more likely to maintain the spin, especially under braking.

Once the car is spinning the weight distribution still has a massive effect on how the car spins and the trajectory that it follows. I’ve driven numerous fast and slow cars on and above the limit. I’ve spun a mid engined car and I’ve spun several front engined cars. Nothing that you do in a rear engined car will alter its trajectory once it is spinning unless traction is regained.