Ethernet is in my opinion only useful, if you want to connect it to a existing network and need reliable connectivity. For home use, usb and WiFi are usually enough. But there are some more differences, you should take into consideration, if I assume correctly, you reside in the USA: Larger Inbox toner (2,300-1,000 pages) Duplex adf Way faster Manual slot for 30 sheets instead of 1 NFC USB host on front scan to, print from usb drive Constructed for a longer life More on reddit.com

The 3780 is about 20 % faster, has 25 % less power consumption, a way larger LCD, ... More on reddit.com

If I were you, I will return the new printer as soon as possible and buy the old generation MFC-L3770CDW because it is still available on Amazon. It uses TN227 toner cartridges which cost less than $20 per cartridge. It’s definitely a wise choice in the long run. Here is the link for MFC-L3770CDW: [Brother MFC-L3770CDW]( https://www.amazon.com/Brother-MFC-L3780CDW-Wireless-Subscription-Replenishment/dp/B07KGXQ6WL/] I believe it will be discontinued soon because Brother wants all customers to buy new printers and expensive cartridges. More on reddit.com

Try this for a compatibility matrix. It's well hidden. https://www.brother-usa.com/-/media/brother/product-catalog-media/documents/2023/10/17/20/49/mfc-l3780cdw-system-requirements-chart.pdf Also, note that it can be used as a generic PCL printer and responds to a lot of things if it is connected to your home/business network: APIPA (Auto IP), ARP, BOOTP, CIFS Client, Custom Raw Port/Port 9100, DHCP, DNS Resolver, FTP Client and Server, HTTP/HTTPS Server, ICMP, IMAP4, IPP/IPPS, LDAP, LLMNR Responder, LPR/LPD, mDNS, POP3, RARP, SMTP Client, SNMPv1/v2c/v3, SNTP Client, TELNET Server, TFTP Client and Server, Web Services (Print/Scan), WINS/NetBIOS Name Resolution (Linux LPR on port 9100, hint, hint, is pretty much OS-agnostic) As for a "driver," I hope you are the actual tech support for this home/biz. Because it is very easy to use emulation like printers have done since the 1990s at least. BR-Script3‡, PCL5c, PCL5e, PCL6 (PCL XL Class 3.0), PDF Version 1.7, XPS Version 1.0 That's a no-brainer as well, so Windows 7 should be easy to implement. The fact you're asking this question means that it might not be or you needed a refresher. Using this comment and Google and you should be up and running in 15 to 30 minutes or so. See https://www.brother-usa.com/products/mfcl3780cdw for where I found this out. Also, I just installed mine a few minutes ago. Excited to try it out! More on reddit.com