KQ vs 4bet BTN vs BB

Grabbed by Holdem Manager

NL Holdem $1(BB) Replayer

SB ($55.45)

Hero ($60.50)

UTG ($209)

UTG+1 ($101)

CO ($35.50)

BTN ($100)

Dealt to Hero KDIAMONd Q:club:

fold, fold, fold, BTN raises to $2, fold, Hero raises to $7, BTN raises to $18, Hero??

con 40bb me parece un call mas o menos claro, pero ¿con 60bb?