A:AnswerAll retailers sell both models. The base model does not include the ethernet capability, the touch ID capability on the keyboard, and it only has one fan. I would recommend getting the 10 core model as it has touch ID, two fans, and ethernet capability as well. The main reason they sell a Wi-Fi connection only is to keep costs to sell more units.
A:AnswerYou'll need to check if the printer model you have or are looking to buy, will be compatible for this computer. I found this out the hard way.
I replaced my 10yr old iMac with this newer updated iMac (24" All in One -M3 chip-8GB Memory-250 GB) and couldn't get the iMac to recognize the printer. After much frustration and prior to having a geek squad tech come to my house, he informed me that the printer wasn't compatible with this iMac. The printer wasn't as old as my previous computer, but old enough as far as this new iMac was concerned.
Needless to say, I had to buy a new printer.