I'm also interested to read your comparison once you get the S10. I'm trying very hard to resist pre ordering from Verizon. So far the rational side of me is prevailing and I haven't done it!
I keep telling myself Android Q first build(s) will probably come out in 3 months, if that, and I'll enjoy trying that more than using an S10...meanwhile I've seen my battery drop a percentage just from viewing this thread for 5 mins haha...battery on this phone is so hit or miss and a big thing that I don't like. I will be paying attention to real world battery life reviews on the S10+ for sure.
Plus you won't have to wait for a year to enjoy Android Q (mmm... system wide dark mode finally) as Samsung is dirt slow in releasing OS updates, plus the carrier's red tape.