I have both the Focal Spirit Pro and Spirit Classic.
I won't say that one is "better" than the other. Both are excellent headphones and you won't go wrong with either. The Classic is more musical while the Pro is more energetic and neutral.
I have spent a long time auditioning the B&O H6, P7, NAD HP50, PSB M4U2 and the Focal is my pick by quite a margin. The only let down is the comfort. B&O H6 still reigns king in terms of comfort.