Chocolate or Vanilla
Yes, and in my case I chose Chocolate (Garmin?) over Vanilla (Dynon?)
Both are delicious, for me the nudge to Garmin two years ago was the deal on the GTN 625 (which was similar to the one mentioned by G3xpert above) and the introduction of the G5. The discount was the deciding factor.
Both Dynon and Garmin had everything I wanted at similar total price with small wins over each other on different technical issues.
Garmin didn't have it in the bag however, if they had not allowed Foreflight to function with the G3x they would have been out despite the discount on a GTN 625.
One of Dynon's engineers is a fellow Sonex builder I know and I felt sheepish telling him I was leaning to Garmin since he was so helpful in explaining the ins and outs of the Dynon equipment. I never doubted I would get good service from Dynon.
The G3xperts have been excellent to work with the few times I needed any thing - which hasn't been often. I have also dealt favorably with Garmin on servo issues.
You can't go wrong either way. (Not to slight GRT, but I have little knowledge of their products)