Question

what is the difference in the pattern of magnetic field due to a circular loop and inside a solenoid

Answer 1

The only difference is circular loop has only one turn,so its induced north and south pole are just opposite and very close. In solenoid the induced south and north pole are some distance apart,as it has more number of turns. The magnetic flux density (B) inside a single loop coil (solenoid) isn't very uniform.

Answer 2

Both have same pattern. But at a point outside the circular loop, magnetic field takes finite direction and magnitude depending on the direction of the current flow.