In practical terms, I don't think it does. The procedure on the Douglas/Boeing 717 is pitch to the PLI (Pitch Limit Indicator - onset of stickshaker), max power, emergency max power if required, and, DO NOT RECONFIGURE until clear of shear.
In real terms, it is most likely that Flap 7 (I assume you means degrees?) will provide better climb performance than flap 15, assuming all other variables are constant but the manoeuvre would be flown the same way for either flap setting.