Your question is Decide Offer vs Leverage. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How do you decide whether to accept an offer or leverage it for a raise elsewhere?
Explain the factors you would evaluate, how you would compare the alternatives, and how you would communicate with each employer. Address both the financial and professional consequences of your decision.