neither do much of anything measureable, so whatever floats your boat.
"
Plants continue packing on bud weight late in the game, resulting in heavy flowers
Creates conditions to provide an unexpected surge of energy for sustaining peak performance through your entire run
Robust nutrition optimizes plant life expectancy"
Bwahahaha.. nonsense product promising shit that isn't real. Way to go AN, you hit another homerun.
This is just more fertilizer -- look at teh guarnateed analysis labels and then the ingredients. it's not special. this stuff is on any old fertilizer you find.. there are options so you find variety of things that provide similar nutirents at different ratios, but your feed should already be "optimized" for P and K and whatever other bullshit AN wrote above. Nothing "packs on weight" .. no prodcut does this. You either feed a plant well and it performs up to its genetics allow or you do not.
finishers, boosters, blah blah blah.. you should have a well-balanced diet at all times.. throwing a bunch of hocus pocus the last 2 weeks isnt' gonna do dick and possibly harm it if not paying attention to overall levels of what you feed.
it's not about "more"... it's about eh right ratio and concentration at all times.. keeping the building blocks readily availabale that get used very similarly by the platn over time. theres' no period of a plant's life where oyu have too "boost" this or that to cause a significant change in results.. that's a bunch of ego driven horse shit.