VWCE tracks the FTSE All-World; IUSQ tracks MSCI ACWI. They're the same trade — the whole investable global equity market in one accumulating, Irish-domiciled fund — and for almost every Euro investor the honest answer is to buy whichever one your broker or savings plan actually carries.
What they share
Both are Irish-domiciled UCITS ETFs that accumulate dividends inside the wrapper — no cash to redeploy, no quarterly declaration, no tax event until you sell. Both are "all-world" in the full sense: developed and emerging markets folded into a single cap-weighted index, so there's no separate emerging-markets sleeve to size or rebalance. Both are unhedged, both have a USD base currency, and the XETR share class you'll buy for each settles in EUR. From a tax-wrapper and operational standpoint they are interchangeable — the entire decision lives in who builds the index.
Where they differ
Start with cost, because it's the fastest thing to dismiss: VWCE is 0.19%, IUSQ is 0.20%. One basis point. On a €50k position that's a €5-a-year difference — it is not a reason to choose either fund, and any comparison that leads with it is wasting your time.
The real difference is the index provider. VWCE follows FTSE All-World (FTSE Russell); IUSQ follows MSCI ACWI. Two index houses reading the same global market, and they disagree in two small ways that are worth understanding once and then never worrying about again.
The first is where they draw the developed/emerging line. South Korea is the textbook case: FTSE classes it as a developed market, MSCI still classes it as emerging. In a cap-weighted global fund that shifts a rounding-error slice of weight from one bucket to the other — it changes the label on a few percent of your holdings, not what those holdings are.
The second is how deep each index reaches. VWCE holds 3,745 stocks, because FTSE All-World extends a little way into the small- and mid-cap tail. IUSQ holds about 2,340 positions, because MSCI ACWI stops at large- and mid-caps. Both use physical replication with optimised sampling — neither holds every name — and at cap weights those extra thousand-odd small-caps in VWCE are worth basis points, not percentage points. Full detail is on iShares' factsheet.
You can see how little this all matters at the top of the basket, where your money actually sits. Both funds lead with the same five names — NVIDIA, Apple, Microsoft, Amazon, Alphabet. In VWCE those five are 15.4% of the fund and the top ten clear 22.4%; in IUSQ the same five are 16.6% and the top ten reach 24.5%. IUSQ is a hair more top-heavy — that's the arithmetic of spreading the same market-cap weights across fewer names — but "a hair" is the whole story. Nine US mega-caps and TSMC run about a quarter of each fund, which is just what cap-weighting any all-world index looks like in 2026.
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Expect the two lines to sit almost exactly on top of each other. Any daylight between them is the classification and depth differences above plus tracking noise — not a real divergence in what you own.
Who each one is for
Pick on availability first. If your savings plan at Trade Republic or Scalable lists one commission-free and not the other, that decides it, and you lose nothing either way. That is the correct answer for the large majority of readers, so if you already hold one, there is no case for switching and triggering a taxable event to save a basis point.
If you're genuinely starting from zero and want a tiebreaker: lean VWCE if you want the marginally cheaper fee and the slightly broader basket — the small-mid tail and South Korea counted as developed make it a touch more diversified. Lean IUSQ if you want the longer track record (it has run since 2011 versus VWCE's 2019), or if you already hold an MSCI-indexed fund like IWDA and would rather keep your whole portfolio on one index house's rules — pairing MSCI World with MSCI ACWI avoids the awkward seam where FTSE and MSCI classify the same country differently.
That's the entire decision. Neither of those tiebreakers should move the needle on a fund you intend to hold for twenty years, and there is no third position worth taking. If you're still weighing all-world against a developed-only core, the more consequential comparison is VWCE vs IWDA — that one actually changes what you own.