I haven't had the Hirsch, I have had the Pappy.
The thing about specialty bottlings or whatever you want to call them, ultra-super-mega-premiums, whatever, is that the reason to buy them is that they are a one-of-a-kind experience. They are rare, special experiences. They're worth $70 for their rarity not because they are necessarily that much better than a less expensive whiskey. A bottle of Pappy doesn't cost 3-4 times more than the lowest priced VanWinkle bourbon because it's necessarily 3 to 4 times better. It goes without saying that a $70 bottle of bourbon had better be high quality whiskey. What I recall about Pappy is that it is a nearly perfect example of that type of whiskey, so if you have had and enjoyed any of the other VanWinkle bourbons, you probably would enjoy Pappy.