[ApK]

Wow. Interesting choice here.

Getting an iPad versus an Android tablet can be a decision based on anything from price, to form factor/screen size, to support, to your opinion of the Apple ecosystem and business model.

For myself, I dislike Apple's system enough to take iPads out of the running.
For others, they clearly perform well, and the support at the Apple Store can be excellent.

iPads are "easier to use?" Not sure that's strictly true.
Android tablets CAN be made more difficult to use because of the variety of apps and options, but they can be darn easy as well. My 7-year old has no problem going between tablets and computer, and also her iPod Touch when she had one.

iPads have the usability benefit of all working pretty much the same way so there are usually fewer variable to account for in learning or asking for help. Great for a certain type user, anywhere from irrelevant to painfully confining for others.

For typing, I have never seen a Bluetooth-tablet arrangement that I was happy with, especially if you might type on your lap, or in bed, or anywhere other than a nice solid surface.
If the keyboard is a key factor, consider a Chromebook (my wife and I love ours) or a 2-in-1 convertible or just a small laptop.

If you are OK with using your phone as a hotspot, I cannot see how 4G in the new device could possibly be worth the extra cost or monthly expense.
If you really needed it, I'd think you'd know it.

I have a 4G tablet only because the 4G and service plan was essentially free for me. I rarely use the 4G and think of it more as an extra hotspot if I don't want to use my phone's battery.

ApK