There's less room between you and the sidewall on the 737 but it feels like a bigger cockpit to me overall versus the 717. There's more distance between you and the boarding area, whereas on the 717, people are getting on/off right behind you. The seats, trips, and landings are better on the 737, but I prefer the avionics and mode control panel of the 717. Lastly, it's so nice to use a hot mic again. For me, that really solidifies the 737 as the better option.