SM capacitor values

May be a stupid question but I assume these are 330uf 6.3V and 100uf 6v (some have 6E other have 6.3V) I couldn't google a constant convention for the markings ?

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Ive just spent another hour looking at markings and I cant see a convention. I am considering swapping some of these out for different caps for the signal ones and want to squeeze in some Silmics, no one got any information to help ?
 
Mark, thanks. I know the 330 and 100 are uf as I can see Cinema-de swap these out for Nichicons and use 330uf 16v and 100uf 25v. I would like to use the minimum voltage as this will allow me to fit Silmic II's - just. At 25V no chance !