There is Serial ATA and the older Parallel ATA standards. Your WD green probably just specifically specifies itself as SATA while the others do not and thus the system just gives it the generic label of ATA
Your SATA slot SSD is an ATA device so yes it is going to have this label. If you had an NVME M.2. or PCI-E card SSD drive then it would not show ATA.
This is an example of making a mountain out of a mole hill. Windows not showing the proper label for a device in its software is very very common.
If you truly concerned then go get userbenchmark software to test SSD and check its write speeds, and compare to others. FYI a good magnetic hard drive will only get around 120-140MBps for sequential read so when you get 200+ on your SSD it is obviously performing better. Random read/write speeds should be a substantial difference than the HDDs.