It's simple, if 16GB works for you you're good to go, especially if you use non local storage. If you think you need 32GB, then you most likely need MORE than 32GB. when it comes to storage space, video is the number one biggest usage of space. 32GB is still simply not enough for this, especially on a device with a 1080p+ screen.
the 32GB version only exists as a way for google to make more money. it costs them $5 to add the extra space, yet $40 more to buy it. with blue tooth, wireless, and remote storage options....the 32GB simply doesn't justify its cost for 99.9% of usage scenarios. the only reason someone should need a 32GB is if they're constantly traveling for days or weeks at a time without access to the internet....but even then, external storage is still a much better option. a 500GB wireless hard drive is tiny and can sit in a bag, purse, or backpack easily out of sight with no fuss....and you can get one for the same extra cost of the 32GB n7. it's a no brainer. 16GB for $40, vs 500GB for $40.
not to mention your battery life on the 16GB will be noticeably better because reading the larger volume of data on the 32GB will use more power than say transferring files over a self powered wireless drive. I'm willing to bet that's why you see some people complain about battery life, because they're downloading and then reading 8GB mkv's for hours on end, which means constant power drain from local storage streaming, along with the initial power drain from putting the files on it in the first place.
This post made me think of my wife and her iPhone. She thought she'd save some money by getting the 8GB model. Now she's always b*tch'n and moan'n because when she goes th shoot an unplanned video of our too-cute son her phones tells her she's outta space. ...and then I have to hand over my S4 that has 96GB of storage...and go dump stuff off her phone so she can use it. I don't know. I'd be hesitant to recommend a 16GB option when a 32GB option exists. ....but yes you can make limited internal storage work for you if you put some effort into it.
Sent from my Note 8.0 LTE