If it
was taken largely from the SS fig, I say it made good of the concept, while also improving on all the shortfalls. Artists usually build off of other artists- get inspiration and creative ideas etc.- just like how you want to build two 1/16 scale Army snipers from that picture, you aren’t stealing from them, you’re just giving it your perspective. I say from 1/16 scale to 1/9- it's not like he took the SS figure and modified it into a modern SEAL to use as a master for his line of figures- now that'd I'd call stealing. Worst case here is just too obvious a source of inspiration. If he did take the idea from the Legend kit- only really changing the hand and the era isn’t that drastic, then leaving the title as is?? Lol
As far as which kit, I’d spend the extra $ on the SEAL, bigger = more detail (if you have the shelf space) and from my experience Legend resin is always hit or miss as far as quality goes from my experience; of course that’s 1/35...
From what I recall, the SEAL figure was far from mainstream in terms of manufacture, so even if the resin quality isn’t a really expensive, fine quality, the quality control should be much tighter as I can’t imagine him cranking out 100s of kits a day- so probably not half as many bubbles and warped parts like I’ve seen with Legend resin.