Extruded Boss and end condition is 'up to the surface' is giving different result for solid body and surface body:
-When body is solid extruded boss is perpendicular to sketch.
-When body is surface extruded boss takes the shape of the model.
What is the reason for these differences?
For your "Up to Surface" Boss-Extrude, you selected the circular face on the bottom of the part.
It will take a little tweaking if you want your solid body to look like this using the Up to Surface command:
It can be done, but you need to make the 4 sides into a single surface.