The Fiskars Stand-up Weed Puller is the better general recommendation because its manufacturer-published details speak directly to the fussy parts of a repeated lawn task. Fiskars specifies four serrated stainless-steel claws that grab a weed by the root, a reinforced foot platform, a viewing window in the pedal for claw placement, an offset handle, and an easy-eject mechanism. Its lightweight aluminum shaft measures 39 inches. Together, those are concrete design choices for a gardener who wants to position the head, step down, pull, and clear the tool without repeatedly stopping to touch the head.
Grampa's Weeder is the honest alternative for a shopper who values a simpler mechanism and its distinct materials. The company describes a three-step design with a long-lasting bamboo handle and heavy-duty steel head, and lists the tool at 3 pounds. That is not a lesser version of the Fiskars. It is a different kind of proposition: fewer described placement and cleanup aids, but a traditional lever-style stand-up tool whose bamboo-and-steel construction is central to the appeal.
Neither recommendation depends on a live price, an unsupported claim about weed species, or a promise about what will happen in a particular soil type. The winner is simply the more feature-complete default for routine use. Pick Grampa's if its straightforward construction is exactly what you want; pick Fiskars if the viewing, offset, and eject details are likely to make the same task less fiddly each weekend.