Vandoren Rue Lepic Bb Clarinet Reeds - Box of 10 - Strength 3

Do these reeds still come in the special rigid set-up box? Or do they now come in a standard Vandoren box?

I play a 4 stength on the v12's, what strength should I play on these?

would these reeds work on alto Bb clarinet

Is the sound a little darker and warmer than that he v12 reeds?