The worms from the Flea Market in the large outside trays are a mix of Yum DIngers, Bass Pro Stik'o worms, Wave Worms, Ocho's, and Culprit. The Flukes are either Zoom, Yum Houdini Shad, and Bass assassin, but those older Yum Dingers and Sticko's are my favorite as well as the Old Bass Pro Knock out worms which are now called the Havoc Money Maker (The KO worm is heavy like Berkley so design is the same, but I am assuming they just picked up the design. The flea market also has the old Bass Pro Stick O swimbaits and because many have been soaking in salt and scent, and the worms on the bottom of the trays seem to have the best action...
I have caught fish on stiff worms, then I have also done great with worms that were over salted and barely stayed on the hook. I think it matters if you are fishing them weightless on a slow fall, as you notice some are softer than others, some are stiffer, and the GYB Senko if you watch it sink has a nice "Pulsating action" when it sinks...
Quick Tip..Go through the camo and green box of worms, the back left half are GYB stamped. They are also 12 grams and cast a mile and who cares if you get one fish per worm, they flutter while sitting on bottom. I think all stick worms work well and it is important to match the action of the worm to the activity of the fish, but I like the heaviest softest worm I can get on the hook and not have it crumble, when you see a heavy salted worm sink on a small hook compared to a stiff worm it is like 2 different presentations all together.
If you like to swim them over grass, I would say grab the soft salted old soaked worms which are inexpensive yet have the best action and I love the green colors this time of year, some of the smaller stick worms are usually stiff which may be good at times, but more salt usually means better action, faster sink, more erratic, look alive at all times, and cast far without weight...With weight, I don't think it matters and all brands make good worms these days, rarely do I buy a pack of anything and think the bait is bad....