Not familiar with the Polaris. May want to describe your music tastes or the sound signature you prefer.
In the past, I've leaned toward a more warm signature overall with the IEMs I've owned. The Polaris is easily the most bassy IEM I've had and it's great for metal, edm, and the similar genres. My all time favorite genre of music to listen to is that of film scores and that's where I think the polaris lacks a little.
I'm looking for something on the neutral side with this IEM that will fill the gap the polaris doesn't. Best way to describe what i'm looking for would be something with great separation and detail retrieval, but doesn't alter the original taste of the track. I'm leaning towards the Savanna right now but would appreciate your advice!