I've finally had the time to compare about 5 bowls of each of these blends. I'll preface this by mentioning that I'm by no means a seasoned pipe smoker, I've been at it for around 10 years which is relatively young in this hobby. I have yet to develop the ability to distinguish between the tinniest of nuances in these two blends. But to my inexperienced pallet I'd say that Penzance is just a slight bit mellower with a bit more "creamy" finish to it. But beyond that I'd give both of these two blends a big thumbs up. I worked pretty hard just to score a small sample of Penzance (2 years it almost took)...... But I was able to buy an 8oz tin of Quiet Nights on p&c without any backorder or delay. For this reason I'd have to give the nod to Quiet Nights. They're both excellent smokes and definitely worth trying..... But for the hassle? I'd go with Quiet Nights EVERYTIME. Were both blends easily accessible I might whistle a different tune, but considering current availability my advice would be: don't beat your head against a wall trying to buy Penzance, there are equal blends available. To the pipe smoker who is searching for Penzance because they want to sample the unofficial "holy grail" of pipe tobacco....... Order a tin of Quiet Nights to sample, it's every bit as good of a blend without trading a nut for. If you don't enjoy it, you won't enjoy Penzance.