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compare also fund volume. For a lower volume fund, you could lose on spread (tracking difference) when buying/selling.

I chose $IWDA after much deliberation given its high volume. In the long run, $SPPW could have higher volume as well and spread may not be an issue.
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@TheGuardian True in this case they are very similar. We are talking about a Spread 0.01-0.02 for $IWDA vs 0.02-0.03% for $SPPW. The ETF size above 5 billions of $SPPW seems huge to me even though much smaller than $IWDA