Both companies have digital and analog.
If you get GLXD from Shure you will not go wrong. I have one and use it when I have to play accordion wireless. Shure comes with really goos battery that can last 16 hours. And you recharge it. Very easy to use.
I also have Sennheiser D1 that I use for my singing when I have too. I use E965 head it is an excellent mic.

This Sennheiser is more money than Glxd. They are all pretty easy to use and whichever you get you will not go wrong.