I've used all 3 and never really noticed a difference except when I used Seafoam on an old 88 Dodge aries that had 6 month to 1 year (if not longer.....) possible (wasn't gonna take any chances...lol) stale gas in the tank.
Before I even cranked it over out of the ladies drive way I added Seafoam to the tank because I heard of it's "rejuvination" properties.....on the way home I topped it off with mobil 87 aki.
As far as marketing vs. quality....it's really hard to say. As noted Seafoam is Isopropanol (rubbing alcohol, without the water), light oil, and naptha. I've used Berryman B-12 in my previous 07 and 08 Kia's and didn;t really notice a difference.....BUT the can does tout some very stout/strong additives/cleaning agents (Xylene, and Acetone to name the 2 primary.....) but it also contains some "Methanol" (often called "gas-a-hol") which some Owner's Manuals will say to stay away from....you'll also want to follow the can instructions very closely, I believe it's 1 oz of B-12 PER GALLON.....BUT the can will work for up to a 35 gallon tank.....so if you got a small compact car with less than 16 gallons, I'd be careful so you don't over-dose your fuel system....I know some people say Acetone is bad for the fuel system since it can degrade the rubber and plastics, etc.....but then there's the other side of the fence that says with the large dilution ratio, it shouldn't be a problem.
Bottom line, Seafoam AND Berryman's have been around forever...tried and testing for many decades
They should be safe if used according to the instructions....and at the intervals stated on the can. If I recall both Seafoam and Berryman's both have the typical 3,000-5,000 miles usage intervals.....
Haven't seen or heard of that new Lucas product though...with all this PEA "hoopla" lately though, I'm willing to bet it's just a re-packaged Lucas Fuel Treatment with a dose of PEA added to compete with the likes of Chevron Techron Concentrate, and GumOut Regane (both of which are readily available at big box discount retailers....).