My experience with b/s woods is that mahogany makes wonderful strumming/accompanying instruments.
Rosewood gives you that articulation and overtones you need for most classical pieces. And we need those overtones, since nylon strings tend to emphasise the fundamental frequencies.
I play an Alhambra and love every of their instruments from series 5 upwards. Lush and silky trebles.
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Nylon string are softer, but harder to play 
Alhambra 11P
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