IT professional here. Used many OSs over the past 38 years. Finally, something that just works and works well.... I own both models. Toshiba sure confused everyone by calling them both Chromebook 2. Make sure you look at the specific model numbers before you place your order so you get the correct machine. I am typing this message on my i3 now (backlit keyboard in the dark). My Celeron unit is right next to me also. I own an IT services company and run my business 95% from my Chromebooks. That means backoffice work like editing contracts, email, spreadsheets, time logs, managing support tickets, client files, website management, remote support/management, invoicing/receipting/quotes, etc. I also place my phone calls with a wireless bt headset (no worries about poor cell signal when you have strong wifi) and do videoconferening. I use them for professional development (webinars, podcasts, YouTube videos for training/learning). As soon as one more application is ported to Chrome OS, I can fully cut the cord from traditional OSs I have run in my shop. I can still remotely access a Windows or Mac box for that "one" application that won't run on Chrome OS at the moment... I also use the machines daily for entertainment (Amazon Prime, NetFlix, Podcasts, mp3s, etc.--usually streaming them to one of my Chromecasts connected to big screens). They are constantly used for general tasks (browsing, email, the occasional game). I've used them as DAWs (digital audio workstations) recording audio via a usb microphone and doing multitrack editing for podcasts. I do graphic design work, website management and layout work. I print to both Google Cloud Print enabled printers (built into the firmware) and traditional printers connected to pcs using the Google Cloud Print plug-in in Chrome. The difference between the machines is noticeable when you have many MANY tabs open. Less hesitation with the i3 if you are say, streaming an hd video from the web and then sending it to your Chromecast (I do this all of the time while working) device attached to your big screen in one tab, while editing a contract in another and doing research and copying big files to Google Drive for example. When switching tabs on the i3 there is not hesitation or glitching or dropped frames or stuttering... The i3 unit also has a backlit keyboard which is one of the major features I needed as I use the machine constantly under all types of lighting conditions (on airplanes, in the poorly-lit server closets at client locations, in bed catching-up on things at night...etc.) The i3 also has ventilation for the fan, on the bottom, that the Celeron unit does not have (no fan). I haven't heard the fan yet though I know it is turning. It also hasn't gotten very hot at all. My phone gets hotter.... The battery life is slightly less on the i3 due to the proc and the fan but still MANY hours longer than my Windows and Mac laptops. I can drop either unit in my work backpack and go all day without the cord. I recently left for a client without the cord and didn't feel the least bit concerned. Could not have done that with any of my other 7 or 8 machines running other OSs (Windows, Mac OS, Linux). If you are into benchmarks, go ahead and run one of the popular ones and look at the results. The numbers are nice.... I manage systems for a living and prefer real world results. I use both machines daily and can say from real world experience, they are both great. If you spend the extra hundred and change, you will be happy as there isn't much more to do than to buy an SD card to expand onboard storage for those times you are not connected to the cloud. 90% of my data is in the cloud and I keep vital things local on the SD card also. The machine has everything you will need and will last you for years to come. Good luck!