I live and fish on Lake Norman over here in NC which is a lake that has about 8 years worth of spotted bass in it now and over 50 years of largemouth since it was impounded back in the 60's and I always find it interesting to talk about these two species of fish with other anglers.
In our lake when the PAA comes here or the FLW and BASS tours or BFL/Weekend Series kinds of things the game plan for many of the pros is the same one I try to use which is get a quick limit of spots and then try to upgrade your creel/stringer with some largemouth as they traditionally have been bigger here. You can very easily get stuck in a "dink-a-thon" and end up weighing in a 7lb bag of spots or make the right adjustments and bring in a 19lb bag of the right ones which may be spots and large mouths but a big bag here is commonly all largemouth.
The spots here are growing now with blueback herring in the fishery so changing tactics for LM only may not always be the best plan but seems to be as "big fish" is always a fat largemouth it seems in our local events. Upgrading size regardless of species is always the game plan as we know.
Some of the things that I've tried and had success with are upgrade/upsize bait sizes, changing fishing locations from the main lake to the backs of pockets, creeks, etc, and flip shallow cover (boat docks for us as we have no vegetation in the lake).
Wondering what you do in a spotted bass fishery that normally has them biting (especially the little ones that are super aggressive) all day long to get some bigger bites from either species?