Answer
The radius of the satellite in orbit around Mars is smaller than that around Jupiter.
Work Step by Step
The orbital speed of a satellite orbiting around a planet or a star can be determined by $$v=\sqrt{\frac{GM}{r}}$$
We can see the mass of the planet $M$ and the distance from the satellite to the center of the planet $r$ are directly proportional. So, with similar $v$, because $M_{mars}\lt M_{jupiter}$, it follows that $r_{mars}\lt r_{jupiter}$
