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International Note 9 Questions...

I have a Note 9 on order from Rogers (Canada), but am interested in the dual-SIM, International Exynos version from eBay. Anyone know if the Exynos version supports Google Pay (one of the ads stated it didn't) or if there are other issues to consider when picking up an international, Exynos edition?
The key motivator for me is the dual-SIM. An unlocked bootloader would be good to have, but not necessary for my needs. Would the dual-SIM Snapdragon version offer any advantages?

N9600 should work in Canada and not the Exynos version due to LTE band support frequency.
https://www.frequencycheck.com/comp...ion-duos-td-lte-cn-512gb-samsung-crown/canada

s20 Fe Exynos 990

Does this 4g version has a Hdr10+ support and can it support 5g later in software update?

Question [NOOB] model numbers

i live in the us and i wanna root so can a exynos s21 ultra have the same model number as a snapdragon?

also is a g9980 a snapdragon or a exynos

9980 and 998U are snapdragon anything else is exynos
reference https://www.techwalls.com/samsung-galaxy-s21-ultra-sm-g998-model-number-differences/

Question Frequency Bands of S21U (SM-G998U1) vs iPhone 12PM

Apple iPhone 12 Pro Max 5G A2411 Global Dual SIM TD-LTE 512GB (Apple iPhone 13,4) vs. Samsung SM-G998U1 Galaxy S21 Ultra 5G UW Dual SIM TD-LTE US 256GB (Samsung Unbound O3) Frequency Band Comparison
Samsung SM-G998U1 Galaxy S21 Ultra 5G UW Dual SIM TD-LTE US 256GB (Samsung Unbound O3) - Frequency Bands and Network Compatibility
Will Samsung Galaxy S21 Ultra work in USA?
Will Apple iPhone 12 Pro Max work in USA?
Samsung Galaxy S21 Ultra Model Number SM-G998* Differences - TechWalls
iPhone - Supported 5G and LTE networks - Apple New Tab
Can anyone please tell me about the practical consequences involved here?
My friend insists that the iPhone is better for travel because of the compatible bands.
And, doesn't the S21U just have a newer version of the same modem that's inside the iPhone 12PM? Shouldn't this mean that they cover nearly all the same bands?
I hate that Samsung doesn't seem to have an official page with their bands listed, like they should!

Which version supports 5G in China

Hi ALL, in the market looking for S20 FE 5G. Low stock of SM-G7810, what alternative can make 5G work in China too? Thanks!