IPhone 6s Plus Upgrade too 13Pro or 14Pro

Hi everyone please can you give me your thoughts on me upgrading from my iPhone 6s Plus too the 13Pro or the 14Pro, I know the 13pro will be cheaper but the 14pro will maybe last longer am also not too bothered about dynamic island or the screen being on all the time, am looking my to preserve the battery, thanks for any advise you can give me.

Thanks James