The first and foremost similarity between the planets in these two groups is with respect to their origin, that is, they are all part of the same primordial solar nebula.
The second most evident similarity between these two groups is that, planets in both groups move around the Sun in an elliptical orbit with varying eccentricities.
Even though, the Jovian and terrestrial planets differ in structure, all of them have a solid core. But relative to the overall size of each planet, the cores of the terrestrial planets are larger than the cores of the Jovian planets.
Planets in both groups have a gaseous atmosphere, but it is very thin in the case of terrestrial planets. All planets are capable of exerting gravtiational force, but the Jovian planets have larger gravitational fields, which help them hold on to their large gaseous atmospheres and numerous moons.
All the planets are almost spherical in shape, of which the terrestrial planets have less flattened poles due to slower spin.
Storms are a common phenomenon found in most of these planets, but they are more intense in the Jovian planets.
Both Jovian and terrestrial planets have an associated magnetic field, but the Jovian planets have much stronger fields than the terrestrial planets.
