That is very difficult to say, since units and weapons are so specialised.
The SM-2 (and -3 and so on) are extremely powerful anti-air weapons, and so are the s-300 forts on the other side.
How are you having Aster/Sampson on a Type 45 stack up against the SM-2 (-3 etcetc) on an American Arleigh Burke class? I'm interested because at the end of last year the first sea lord was sounding particularly pleased when he mentioned in an interview/report that the Americans had had to ask us nicely to "shut down our radar because we were spoiling the training". The Type 45 while on exercise with an American CBG had apparently caused them some REAL problems due to the power of Sampson.