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iShares calls it "Core", but it's actually just a normal MSCI World. So it should be the same ETF twice from different providers, and I would go for just one to keep the whole thing leaner. :)

Is the second one accumulating/acc or distributing/distributing? There may still be a difference.
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@SSIT. I have now linked them both again
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@investmentmaus In my recklessness, I was already counting on the iShares and not the Amundi. :D

The biggest difference is full replication vs. optimized sampling. Personally, I like the sampling better if it translates into a lower TER.

But in principle you have the same product twice.
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@SSIT but there is no lower TER for the two, one ETF provider only earns more.