I'd love to see a good comparison/review video of these two sets.
edit: as it is though, at least the video does give me an almost decent look at each one (not much of an idea of the full range of vehicle articulation because I don't have x-ray eyes, and some of it just wasn't covered - do either of the cranes rotate like the original Hook's could?)
from a purely aesthetic comparison, I like the Maketoys versions better. The TFC ones, whilst bigger, do seem a lot less real to me. They're more like Cybertronian vehicles than the Giant ones. I do like that some of the Hercules cockpits (on the bulldozer for example) look like the G1 versions, but there are definitely a lot of updates made to the designs. The only TFC vehicle that I feel is really much better is the dumptruck, and I'd still liked to have seen if either of them could actually tip the back of the truck, or if the stuff in those barrows could be removed.
Right now, not regretting holding off on making a decision, and thinking Giant might be the way to go. Bring on the robot comparisons!
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Prowl, Astrotrain, Ramjet, Skywarp, Sunstreaker, Sideswipe, Blurr, Perceptor, GDO Wheelie and Springer, or 3rd Party Motobot Arcee, FP Springer, iGear Ratchet and Ironhide, City Commander (and/or Ultra Magnus), Starscream (deluxe) Coronation add-on, or Spike and Daniel in their Exo-Suits.