The synastry chart gives a stronger impression of two people sexually/romantically attracted to one another, with the wide Mars-Venus contacts* but without much glue in other departments of life to sustain a supportive relationship. That they might find this thrilling anyway is suggested by the Pluto-Mars trine, and by the inner person's Jupiter conjunct the outer person's sun.
Squares and oppositions can generate a lot of excitement, but they are not fundamentally harmonious: they are stressful.
*normally I wouldn't allow a 10-degree orb for Mars and Venus, but in my experience relationships can take off with wide orbs.