I have most of most popular tips; Sedna (both long and short), Marshmallows, Whirlwinds, Dekoni Audio, Spiral Dots, the list goes on.
And one thing was a fact that wide bore and shallow fit will always increase sound stage and make airy.
So interestingly Horned Tips breaks all those rules. As you see they are nowhere near shallow fit. They are actualy pushing Rahs out of my ear a bit because of length. They are also just about mid-width bore. Similar like sedna but theh feel like there is notheing in your ear. Sound just flies around. And too make it more interesting bass is not recessed to abyss it is just where it needs to be.
I find them to work well with Rah. And isolation is no worse then whirlswinds or spiral dots.
So now my to 3 looks like this;
1. Horned Tips
2. Whirlwinds
3. Spiral Dots
As for short sedna vs regular. See below maybe that will help;
Bore seems same leghts so dont know if you will get a deeper fit. Maybe?