Earlier quoted context omitted.
The difference is that The Ship of Theseus had all its parts replaced one by one, in a long period of time. If you replace 90% of the ship at the same time (RAM, CPU and Motherboard), then the analogy breaks down.
It's a perfectly understandable analogy unless you nitpick for no reason.
That's why I said "you can believe your story" while I pointed out it's a very unlikely one.