I have the choice between 2 15" Fosgate T1's or 1 15" fosgate T2. If I buy the T1's(t115d2) They would be powered by one Alpine Mrpm1000 amp. 500w a piece. With the T2 it would be at the recommended RMS(1000W). If I bought the T215d4 would it be louder than buying TWO T115D2's?