SOAP – come and join mine and Chiefs Spitfire + Soul team!
Like p20 said, they are quite different, but I use them for different rides (though to be honest, both are great fun at the local trail centre). I just enjoy them differently. The spitfire is quicker in the rough stuff as it just eats rocks (as you know), but I enjoy the sprightliness of the Soul in comparison. I have 120 mm Rebas on the Soul and 150 mm Pikes on the Spitfire. I see the Spitfire as a mountain slayer and the Soul as a cross country and play bike (play for me does not involve large/any air time!). I personally dont notice a massive difference due to geometry (though its obviously there), but rather the difference between a full sus and a hardtail, and whichever hardtail it is isnt going to to change that. So stick with the posh steel!