Feliway Friends Vs Feliway optimum?

[Toddlerteaplease]

Is there really any difference? Freinds worked really well for Cheddar and Penelope. But expecting Paddington to be very shy and nervous, I bought optimum. But he's confident and Penelope is nervous. Is it worth try in the friends again?

Mine could not handle the friends version and it drove them crazy. The optimum is a different story, instantly calmer and happier , so successful i can now tell when it is running low. So, yes they are very different.