As far as pickups go... Your pickups probably have about the same output levels. The bridge may be slightly hotter by a few Hertz. Not hot enough for you to really tell the difference though. You may have to consider changing it out to get the tone that you want...
Now for the difference in magnets...The most common magnet types are alnico (a composite made of Aluminum, Nickel, and Cobalt) and ceramic. There are also different types of alnico, the most common being alnico 2 and alnico V (5). In general, pickups made with alnico 5 tend to have the warmest, “sweetest” tone. This is definitely contributing to your problems... Alnico 2 pickups will have more upper range frequencies, producing a slightly brighter, punchier tone. Ceramic magnet pickups often have the most output, and tend to have a harsher, more biting tone. This is because ceramic magnets are typically much stronger than their alnico counterparts. “Distortion” or “overdriven” pickups are nearly always made with ceramic magnets. There are plenty of exceptions to all this. Pickups made with Alnico can be engineered to have a harsh growl to them, while pickups with ceramic magnets can be made to produce a softer tone. So, Alnico 5 pickups can be modified to be brighter... usually they do this by wrapping an extra thousand or so more wire wraps around it to boost the output. You most likely won't find someone in your area that wuold want to do this for you though... haha. I would suggest trying out all that Doc said... then as a last resort look into the other Gibson humbuckers that are slightly hotter and that have either an Alnico 2 or Ceramic magnet. Hope this helps.
