Act 5, sc. 2, lines 301-309: how do these lines illustrate a contrast between the character of hamlet and the character of Laertes?

HORATIO
300They bleed on both sides.—How is it, my lord?
OSRIC
How is ’t, Laertes?
LAERTES
Why, as a woodcock to mine own springe, Osric. I am justly killed with mine own treachery. (falls)
HAMLET
How does the queen?
CLAUDIUS
    She swoons to see them bleed.
GERTRUDE
305No, no, the drink, the drink!—O my dear Hamlet!
The drink, the drink! I am poisoned. (dies)
HAMLET
O villainy! Ho, let the door be locked.
Exit OSRIC
Treachery! Seek it out.
LAERTES
It is here, Hamlet. Hamlet, thou art slain.