Each copy exiles the top card of your library, and you can cast them on your next turn
Clue tokens are a little niche, but they can be very effective as you can pay two mana to sacrifice them to draw a card
You do need to deal combat damage for their trigger, but with menace that shouldnt be an issue, and as we all know, cheating on mana costs is one of the most broken things you can do in the game
This makes sense: other than a few small cosmetic differences (expansion symbol and watermark, mostly), these two foils are identical
Hammer-lanche has you discard the top six cards from your deck, doing 100 damage for every Energy card thats there
Copies elsewhere have sold for even higher, selling for as much as $139.99 this past week