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It is completely different, clipboard hijacking changes the address fully, but on address poisoning, it did not technically change any address. This specific scam, the scammer makes use of user behaviour when they are using a wallet. Most of them copy an address from the last transaction from their wallet, which in turn, this is the part where the scammers get in.
Do also note that there is also a web extension malware who are similar to clipboard hijacking but the displayed address is not changed visually but within. So, the displayed address is kept but when the user clicks the action either withdraw or anything, the address that is actually being sent is changed.
It has to change at least one character of the address. It could be a letter or number. Scammers can forge almost identical addresses, but not exactly ones. The point is that they rely on the fact Metamask displays only the summed up version of the address, so not everyone checks it completely, especially the characters of the middle.
To avoid being scammed, better to only copy addresses from valid transactions or from a saved notepad file, instead of going for the most recent transactions' history on Metamask.
We are talking about the misinterpretation of clipboard hijacking with this kind of attack. Which is completely a different kind of scam. One is because of malware, and the other is because of users' carelessness.
I know that address poisoning attacks are making use of the general most of wallet last transaction address and deceiving user behaviour, combined with profanity address of the user owned/interacted address, it is the way of how it works.
~which means you really have to check everything multiple times so that you won't be another victim of this kind of scams.
Another solution to prevent this kind of attack is to utilize the saved address feature if the wallet has one. For example, Metamask has an address book feature that can be utilized to save addresses. Although, your solution does indeed the safest solution. Actually, rechecking an address should be a habit of cryptocurrencies users.