Hello, is there a way to have a tapered extrusion of a curved surfaces? If not, is there an easier and faster way to loft the edges of two curved surfaces than one at a time?

I created a sphere, a curve which I then filleted. I copied and pasted the sphere and used Trim on the copy and selected the curve and got a cut surface. I then made a copy of the surface and scaled it smaller and now I want to loft them together to make a solid and Boolean Difference the sphere.