The person who has a better marriage life between Jessica and Portia is that one cannot pick objectively as they both have merits in their marriage.
How to quantify the better marriage ?
Jessica's better communication skills, as mentioned in point (a), could positively impact her marriage. Effective communication is key to resolving conflicts, expressing needs, and fostering a deep understanding between partners.
Portia, as the sole heiress of a wealthy estate, enjoys a life of financial security and stability. Her social standing and wealth provide her with a level of independence and autonomy that Jessica may not possess.
While Jessica's marriage to Lorenzo is passionate and exciting, it also lacks the maturity, respect, and shared values that characterize Portia's marriage to Bassanio.
Note ; This is based on Shakespeare's Merchant of Venice