I've always seen Juliet as the strongest character out of the pair, and Romeo as weak.
Romeo is regularly called out for his weakness, most predominantly in my opinion, in Act 3 Scene 3 by the Friar. "Art thou a man? Thy cries out thou art; thy tears are womanish," which to me shows the Friar becoming annoyed at Romeo's ways, emphasised by the adjective 'womanish' as women were seen to be weak.
I feel this is also presented in their suicide. Romeo chooses a quick, and painless way out with the poison, whilst Juliet uses the more violent and painful 'happy dagger' which could make her seem the stronger of the two.
Finally, you could say that Juliet is stronger because of how her parents act with her. They seem to be concerned about Juliet's power, as they use Tybalt's death as a reason to ask her to marry, as if it's for her benefit and not theirs. 'Well, well, thou hast a careful father, child, one who, to put thee from thy heaviness, hath sorted out a sudden day of joy, that thou expects not, nor i look'd not for.' This proves to me, that Lady Capulet fears she will refuse, and disobeying parents was a very rare thing in the Elizabethen era. This proves Juliet to be stronger than Romeo, as he to me, is presented to be weak.
Anyone have the same, or different opinion?