I've been thinking about how the 3 is different than my Model S and I came up with this list vs my April 2014 Model S: AutopilotDidn’t exist in April 2014 for TeslaActive safetyAutomatic emergency braking, collision avoidance etc. These didn’t exist on the S in 2014.All-Wheel DriveAlso didn’t exist in April 2014LTE network connectivityAlso not available in 2014. Faster maps, faster streamingAvailable as a $500 upgrade for my Model S, but not worth the priceBuilt-in front consoleI added an aftermarket EVannex CCI to make up for thisRear cup holdersI added an aftermarket EVannex Rear console to make up for this too although it’s not nearly as convenient as the flip down cup holders in the Model 3Rear USB portsCoat hooksI added EVannex aftermarket coat hooks for my SFront door storage areas/pocketsRear set pocketsCargo coverIn this case via a trunk, but in my Model S they didn’t provide the rear cargo cover and it was always too pricey after the factSizeThe smaller size of the 3 can also be a benefit for those with smaller garages, and parking in the cities or in general. The Model S is a very long and wide car which can make it a real pain to park at times.SpeedWhile new Model S’s all outperform the Model 3, the 0-60 is 5.4s in my Model S85. The long range Model 3 does 0-60 in 5.1s and will probably be a bit better when configured with AWD. The Model 3 will be faster than my S.RangeThe long range Model 3 has a smaller battery than my Model S (80kWh vs 85kWh), yet is rated at 310 miles of range vs my 265 mile rating. That 310 will also likely be a shade longer with AWD configured.Premium audioI have standard Audio in my S and wouldn’t pay for premium as an extra but it seems it would come with the package in the 3.Fog lampsSmart phone docking in center consoleModel 3 climate control system with the fancy new air direction controlsAdjustable height seat beltsThis is a big deal for my wife as she’s 5’0″ and the S ones are too high for herLighted vanity mirrorsMy S has vanity mirrors, but no lighting.Power close charge port doorThis doesn’t exist on early Model S’sUnkown items There are also a few items that I suspect will be better in the 3 than my S:Tire Pressure Monitoring SystemThis one I’m a bit unsure of. A TPMS exists in the 3, but can you see individual tire pressures as you can on the newer S’s? If so that is something I don’t have. Today, I can only tell if a tire is low and then I have to check all 4 to find out which one is low. It would be great to be able to see the actual pressures in each tire rather than checking them all by hand weekly.SeatingWhile I don’t have a problem with leather, supposedly the new material they’re using instead of leather is quite durable and comfortable.I have the first-generation Model S seats, they’re on the 3rd generation right now for the S. Those first generation seats are pretty uncomfortable on long drives.I expect the Model 3 seats to be better than the ones in my Model S.Heated steering wheelThis doesn’t exist on my S even though I have the cold weather package as it was added into the package later. The newer Model S’s have this. I don’t know if it exists on the Model 3 or not. If it does it would be a welcome addition.Road noiseThe original Model S’s were poorly insulated from road noise. In newer cars, they tightened up the tolerances, added more sound deadening material and generally reduced the noise. I suspect the Model 3 will be quieter than my Model S.That's a lot of progress in 3.5 years!