The leaves on my OS and LZ don't have much smell yet. Most of the sap is going to the fruits. Will have to remember to check the sap smell when I harvest fruits. But, I remember them being identical.
One thing I have been noticing now that I've been comparing the lemon series mangoes (PPK, LZ, and OS) is that PPK is more similar to OS than to LZ. LZ has a milder flavor and a different flesh consistency, also less prone to jelly seed. Bummer that zills stopped grafting LZ, as it's my favorite mango of the 3. Brix on the first few LZ's has been in the low 20's. PPK has been in the high teens, with a couple of fruits hitting 20. Haven't tested OS yet this year.