Main differences between a Dell Vostro 3470 and 3471?

Vostro 3470 is Intel chipset H370

3471 is Intel chipset B365

comparison of chipset https://www.shareus.com/computer/intel-300-series-motherboard-comparison.html

One difference is B365 has no wireless AC, H370 does.  H370 has 20xPCH PCIe. B365 has 16x.

Edit  Looking further I see the H370 CHIPSET

They are both SUB COMPACT systems with tiny power supply.

https://www.dell.com/support/manuals/en-us/vostro-3470-desktop/vos_3470_setup_specs_manual/system-information?guid=guid-a3dcee24-7c97-4560-bc03-3f8a60d2c5b3&lang=en-us

Dell Vostro 3471 - SFF - Core i3 9100 3.6 GHz - 4 GB - SSD 128 GB Specs

https://www.intel.com/content/www/us/en/products/devices-systems/desktops/pcs/dell-vostro-3471-H76726506.html

https://www.dell.com/support/manuals/en-us/vostro-3471-desktop/vostro3471_sff_setupspecs/technical-specifications?guid=guid-aeba1956-9510-43a8-9976-82cc551d38b5&lang=en-us

Intel vPro® Platform Eligibility  NO

Intel® Trusted Execution Technology  NO

3470:

3471:

Wireless module specifications