For me, they're totally different tactics and completely different approaches.
Hard Baits, IE: Lucky Craft Pointer, Megabass Vision 110, XRap, Husky Jerk, Ima Flit....
Primary method of fishing these baits is in cooler water, early and late in the year. They suspend, rise slowly, or sink very slowly thereby allowing fish to move on the bait without expending tremendous energy. It's all about the hang time during these times. Various sizes available, fish will certainly show a preference at times for one profile or another. Cadence can be varied from very slow to even slower. There are times when I will move a bait only slightly in a period of a couple minutes. It's sometimes painful, but it's often productive. As temps warm and fish become more active, adjust your cadence to suit the temperatures and listen to the fish, they'll tell you what they want. Also, don't limit yourself in terms of when to use them, or where. Mid-summer throwing Deep versions can be very, very productive on deep weedlines when fish become lethargic. They can also be a great trigger in "ripping." I also go so far as to classify Rapala's, Thundersticks, Rogues, Redfins, and other minnow-type baits here. There's no wrong time to fish them. They work year round.
Soft jerkbaits like a Fluke, Caffeine Shad, Zulu, ZToo, Bass Assassin, and Sluggo are better suited, for me, to when fish are either focusing on schooled baitfish, or they are in areas that more traditional jerkbaits aren't an option. Most of my "Fluke" fishing is done when the water temps are above the 60 degree range. They can be excellent spawn and post-spawn baits. There's a variety of ways to fish them ranging from nose hooked to keel weighted. Most often they're a TX Rig bait, I prefer a swivel about 8" up wit a red glass bead to protect my tiptop. I love them for fishing weed edges when fish are active and chasing prey. I like to Carolina Rig them on several lakes I fish. Without a doubt one of my most productive "fluke" bites of the year is when last year's fingerlings are approaching the 3-4" size. Fishing a Fin-S Fish or SuperFluke Jr weightless and dragging the bait on the surface while twitching it can be deadly. I also like the small sizes early, nose hook a Tiny or a 2.5" FinS, twitch twitch bang...
That's a starter. I'm sure there are lots more to add.