I just want to point out that "we can observe that they are really similar" isn't likely to impress a statistician. It's possible to make a ballpark estimate of

I just want to point out that "we can observe that they are really similar" isn't likely to impress a statistician. It's possible to make a ballpark estimate of how close they actually are because there is a graph with marked axes, but the real derived parameters would be nice to know, and maybe even do the legwork and calculate the expected error for your sample size.