IPhone 11 Pro significantly slower LTE performance than a Pixel 4 - LTE Advanced not supported?

[YaBoi]

I have an iPhone 11 Pro and recently tested out an unlocked Google Pixel 4 on the same SIM. When using the O2 SIM on the Pixel it noted it was on "4G+" which I understand is also known as 'LTE Advanced'.

Using the same Speed Test app on the iPhone and Pixel, it showed a reliable 3-4x faster download and upload speed on the Pixel than the iPhone in the same location.

Is this because the Pixel 4 supports more of the LTE bands O2 uses than the iPhone 11 Pro?

[jonsie]

Or an aeriel issue with the iphone.

[MI5 · Accepted solution]

@YaBoi 

iPhone 11 is rated CAT16 for LTE- A, whereas the Pixel 4 is rated CAT 18.
This gives the Pixel a theoretical advantage of around 180mbps for download speeds (dependent on network capability).

[jonsie]

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@MI5 wrote:

@YaBoi 

iPhone 11 is rated CAT16 for LTE- A, whereas the Pixel 4 is rated CAT 18.
This gives the Pixel a theoretical advantage of around 180mbps for download speeds (dependent on network capability).

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And there you have it 

[YaBoi]

According to wikipedia (https://en.wikipedia.org/wiki/IPhone_11_Pro) its "Gigabit-Class LTE Cat.19 with 4x4 MIMO".

[MI5]

Must be the inferior cpu then