I'd go for the iPad, my experience of Samsung stuff is they're a bit lacking with long-term support and Apple do seem genuinely quite good at that on iOS. Also the app support is larger as it's a bigger market.
We have some oldish Samsung tab at work for a software project and it's ok though.
By the way, whichever you choose, it looks like there's a teamviewer for both Android/iOS, so you might be able to grab remote control to help.