I couldn't resist buying one of each (because even scams have a place in my collectrion; I use BFL miners as stand for KIALARA wallets so...) but by putting them sida-a-side with the already known graded Sol Noctis scam coin from this thread
https://bitcointalk.org/index.php?topic=3315347.0 the visual differences become obvious...
Although the diamater fits exactly (so the CoA meets the coin which could give some trust in the product's legitimacy) and the coin itself has 31,58 grams (1 oz fine-silver is somewhere around 31,1 grams depending on where you look up) you just have to look at the year of issue... and the whole HOAX gets flushed down the toilette => I would call it a "Wannabe-Fake-Scam-Coin"
The Mint of Poland of course did no official series of BTC related coins in any year whatsoever (and I would be very angry if I were them, when somebody uses my credibility to mimic scam coins):
https://en.mennica.com.pl/coins-and-numismatic-products/catalogue?issue_date=2014%7C2019&type=silver%20coinBy putting a "Binary Eagle" and a "Binary Bull" side-a-side it becomes obvious: the same people are minting those coins and although the purchase went absolutely smooth (€35,- per coin in perspective to an official ounce:
https://www.muenzeoesterreich.at/produkte/1-unze-feinsilber-999-verpackt => fun fact: I've seen gold being sold out at Austrias mint after Covid hit, a short while after platinum was sold out... but silver coins being sold out is new to me) it brings the ebay seller very close to those who minted them in the first place. They are poorly experimenting with stickers (I wouldn't call this a hologram) and I'm pretty sure they tried to trick or will trick anybody who is going to fall for that fake of an already scam.
Edit 4 more infos & visual differences (e.g. in symmetry: the graded eagle coin starts with a stroke at the eagle's beak, the coin from ebay does not^^)
More edit and all jokes on me because according to
https://wiki.coin.community/Sol_Noctis_Binary_Eagle the coins from ebay are the real-deal-scam-coins and the graded one is already a knockoff which made it to get graded? Did I get it right at least now?