You should always try and develope your skills further IMO, especially while sparring, I don't think overwhewlming the same sparring partners every time, simply because you can, will be very beneficial in the long term.

In competition of course, you should take the fight to your strengths and fight your own fight rather than the other guy's. Hagler trying to out box leonard in the earlier rounds lost him the fight.

You should stick to the strategy that works for you, it's worked for many people in the past. I don't think sacfrificing some of the training you're doing at the moment to fight in a competely different way (e.g. like a pure counterpuncher) is the way to go, rather honing on the mistakes you're making and closing down on the openings you're giving away while applying the pressure. Succesful pressure fighters like Duran, Hagler, and Diaz at the moment, have a good defence, wheras the guys who fall a little short from the top (Miranda, and Valero IMO eventually) rely soley on overpowering their opponents, which works well up to some point.