More Regarding Professor Wilson
Wilson's book is in a library miles away. I believe he simply wrote that comparison is "interesting" and both plays have tragical and comical elements. He also wrote that he found Shakespeare's sympathies were no less for Shylock than "the spitting Antonio." Perhaps this opinion is more likely if R&J is fresh in the mind of the reader. For example, Romeo's "The time and my intents are savage wild, / More fierce and more inexorable far / Than empty tigers or the roaring sea"(ROM5.3.37-9) clearly corresponds to lines from Antonio and Gratiano in Act 4, scene 1 of MV.
More linguistic connections
In the first scene of MV we find: "I pray you, good Bassanio, let me know it, / And if it stand as you yourself still do, / Within the eye of honor, be assured / My purse, my person, my extremest means / Lie all unlocked to your occasions." Therefore, Antonio is much concerned with the concept of "honor," as was Tybalt: "Now, by the stock and honor of my kin, / To strike him dead I hold it not a sin"(ROM1.5.60-1). Capulet responds to his nephew: "Why, how now, kinsman? "Wherefore storm you so?" In Act one, scene 3 of MV we have: "Why look you, how you storm!" We may then infer various things.
The "strange nature" of the suit
In his book THE AGE OF SHAKESPEARE, Professor Kermode wrote of the trial or court scene: "The trial is folklore, and the judgment comes from a folklore lawyer, but the issues are real enough." Therefore, the scene is exciting. Further review, I think, allows one to suggest that only Shylock, Antonio and Portia make it so stimulating. The Duke gives us a clue regarding why he is allowing the case to be presented: "The world thinks, and I think so too, / That thou but lead'st this fashion of thy malice / To the last hour of act, and then 'tis thought / Thou'lt show thy mercy and remorse more strange / Than is thy strange and apparent cruelty"(4.1.16-20). That is, he hopes that the proceedings will resolve, at least in part, the conflict between Antonio and Shylock. When this is not happening, he turns things over to Portia. Her "the Venetian law / Cannot impugn you as you do proceed"(4.1.180-1), is one of the "thousand raw tricks"(3.4.77) that she warns us she may "practice." It also allows her famous "quality of mercy" speech that may be be intended to save the life of Shylock. Bassanio's "You shall not seal to such a bond for me!"(1.3.150) may mean simply that he regards the proposed terms as "bad form." Therefore, Shylock and Antonio alone regard the forfeiture to have any legal standing.