iPhone 11 or Samsung S20?

Hi guys,

I've been a die hard Samsung user since Samsung Note 2.

Now I'm currently using a Samsung S9+ that I had bought refurbished, while currently on a Sim Only plan (£25 for 28GB data on Vodafone).

However, I've recently received a notification saying my battery is old, or deteriorating. Samsung told me they can't fix it because its refurbished, but the phone has 1700 charges (they probably used an old battery)... And I could use a 3rd party vendor to fix it for £50-£60.

However Sky Mobile does 2 year contracts with £33 S20 Plus 5G 128gb, 25gb data, and the rest of the phones being unlimited being the most expensive with unlimited data, so I'm considering leaving Vodafone for Sky with a phone contract, but I'm not sure which one.

Since my girlfriend has an iPhone I've been looking at it, and it doesn't seem all that bad to me. The only thing I'd have to get used to really is no SD Card. I current have a 128gb and 64gb card almost full, I guess it'll teach me to stop hoarding screenshots and snapchats?

Tldr; I basically would like pros and cons of the latest samsungs / iPhones, from personal experience.