You should also know that a new iPad Mini is imminent, so this comparison will be dated fairly quickly. Also, there are 11" iPads/iPad Pros/iPad Airs that are worthy of comparison.
We could compare to the iPad Pro or the iPad Air, but then the iPhone duo just looks like an absolute bargain in comparison.
The 11 inch iPad Air with the same storage as the duo and cellular data is $1000, and an iPad Pro with 256 GB and cellular data is $1350. And again, before tax, Apple Care, cellular data plans, etc.
An 11- inch cellular 256 gigabyte iPad Pro and an iPhone 18 Pro together are $2548, and that’s before tax.
Add in tax, an Apple Pencil, a smart folio case for the iPad, and you’re looking at well over $3000.
Edit: I was actually wrong, upgrading to cellular on the iPad Pro is even more expensive than I thought, a full $200, not $150 as I originally stated.
So that’s $1399 for a 256 gigabyte cellular 11 inch iPad Pro, bringing our total before tax up to $2598.
In other words, it’s 600 extra dollars to get an iPhone Pro and an iPad Pro together, then it is a duo. At least if you want cellular data.
And even if you opt for Wi-Fi only, it still $400 over the duo.
The iPad air isn’t much better.