That is what I like most about the class - the sailor makes the difference, but you can keep your brand loyalty, buy sails to suit, etc.
GBR6 - I wonder if you had the same Goodall main that I did, with slightly (40mm) more at the top. With the new 1m limit on the head of the sail coming into effect in January, I expect your new Landy main measures to the new rule and may account for the difference in feel. Here in the US, we get a bit less wind than you do in the EU, and therefore I will miss that extra bit up top in the typical conditions we see. I found that, even as the breeze built into the upper teens and lower 20s, the top of that sail was easy to spill off, which kept me more on my feet once I learned that trick.