The AMX

The AMX, just like the jeep, is a cavalry with a bonus against the infantry.
Compared to the jeep, it is more solid and better armed, but consequently less nimble to move.

In spite of its more important range of attack, its vision, weaker than the jeep's one, can make you hesitating in the choice between these two units.
Compared to the jeep, the AMX can seem less interesting for hunting infantries, but its characteristics make it an unit with a correct weapon power to attack units against which it does not have bonus, contrary to the jeep.