I currently have the Note 9 and decided not to upgrade. I feel the phone is more secure than the 10 due to iris unlocking and physical finger print reader. The only upgrades you're getting out of a 10 is camera, a bigger battery, newer processor, and reverse wireless charging; which let's face it, is really only a gimic at this point. As you stated, the PPI is less on the 10 or 10+ than what's on the Note 9.
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