With the criteria you mentioned, I'd say a Chrome tablet would be better. The main reason is browsing -- it's much faster on a Chrome OS device than on any tablet. For example, when I compare doing forum work on my cheapest Chromebook vs my Pixel C (arguably one of the most powerful Android tablets in existence), it's still no contest -- the Chromebook is always clearly faster.
Android app compatibility is still a bit of a wildcard. I don't use many on my Chromebooks, but I have found a couple of games that act a bit wonky. I'm sure that'll continue to improve over time, but if Android app use is your primary goal, then it might be better to wait a little.
Considering how much effort Google (and other manufacturers) have been putting into Chrome OS lately, though, it's clearly the platform that will see the most development and improvement.