A couple years ago, shortly after I had bought a Garmin 5", I was lucky enough to win an Elite.
Tried them both, and I forget the measurements, but the split screen - side by side views - the Elite screen was narrower (and taller) than on the Garmin.
The Garmin was just more visually appealing to me so I let the Elite go.
Try to find a shop (West Marine?) that has both on display and compare.
With the freebie Navionics now provided I might have had to adapt.