I'm asking this question as a general rule not an absolute rule. If you are fishing lake with a larger population of spotted bass does it seem like a shakey head is more productive than a standard texas rig? While if you are fishing a lake with a larger population of large mouth bass that the texas rig is more productive than a shakey head?

2 different techniques for different purposes. Texas rig for me is shallow water in and around cover, the shaky head is a deeper water, 6'+ in light cover and more open areas, more of a finesse technique but it doesn't have to be like that but that is the general way I use them. I sometimes fish a finesse texas rig using a light weight and small worm and I also have a power shaky head with a big head and 10" worm, that is the contrast as both can be used in different ways but I wouldn't let species population dictate what I'm going to use. I would opt for finding fish and then base my presentation on location and match the size of the bait to the fish. In a lake with a lot of spots and they are biting in 8' of water around docks floating docks I'll use a shaky head but if they are wood or metal docks that are permantly in place with posts I may opt to use a finesse texas rig. On a lake with more largemouth you may find them relating to stumps in 3' of water or maybe they are laying in 5' deep holes in a large weedbed, in those situations I'm using a texas rig but maybe the stumps are isolated in 6' of water with little to no cover around them well I might use a shaky head in that situation.

I fish both from bank shallow out to 30’, all types of cover & for both species

In the North Texas area there is so much fishing pressure that finesse techniques work better from late Spring until Fall - in other words, when most people are fishing. I've found the shaky head works best during this high pressure time. Other times a Texas rig - using the exact same bait - will produce better.