Basically, B350 came out with the 1000 series CPUs, and B450 was the equivalent chipset for the 2000 series CPUs.
If you've been sitting on these boards for a long time, chances are the B350 won't support the 2400G and will need a BIOS update.
It will support the 1700 out of the box.
Luckily, you have a 1000 series CPU, which will allow you to update BIOS' as necessary anyway.
You're looking at equivalent boards anyway so, provided the relevant BIOS is installed, you could pair either/or with either/or and see no difference in performance.