He ambigously argues with his inner opposite, his virtue /his Queen. One can assume with considerable plausibility, that the author (Marlowe/alias Shakespeare) sees himself metaphorically in the mirror...
13 the foolish Boy that did aspire to touch the glory of high heaven's frame, compare me to Leander struggling in the waves, not able to attain his safety's shore
26 the proud aspiring Boy that needs would pry into the secrets of the highest seats, had some conceit to gain content thereby or else his folly sure was wondrous great
Superficially the last 2 lines ("Couplet") in these "Shakespearean Sonnets" 13 and 26 differ, they disclose the matured art of Marlowe's (alias Shakespeare's) remarkable verbal dexterity, his incomparable astute use of ambiguity and ambivalence ..(13 I die [not really but] to live in care..... 26 though I know it [that these did die] even so do I [ at the end]