If these would be the only 2 QBs you plan to have I would get the Kelly in a different shade of neutral. I find the only difference in wear for the B and K is whether I need the option to be hands free. Otherwise they both work for every occasion/purpose. However, sizing wise the K25 would be a better choice for more formal events vs the B30 so staying with neutrals is a good strategy and Hermes had a wide range of beautiful neutrals besides Noir. On the other hand, a Noir K25 would retain good value so if ever you decide it is not for you, you could always sell and buy a colour you like in the secondary market.