I always have two starters going, one with a mix including whole wheat/rye/AP and one straight AP. My WW starter always takes longer to rise but has more strength than my AP one, so it stays at peak longer. They eventually rise to about the same height though. Hope that helps!
Whole wheat has more nutrition which makes the yeast ferment it faster. But the bran interferes with the gluten so it can't rise as high.
I always have two starters going, one with a mix including whole wheat/rye/AP and one straight AP. My WW starter always takes longer to rise but has more strength than my AP one, so it stays at peak longer. They eventually rise to about the same height though. Hope that helps!