They are not the same because CBDC can only be implemented if cash is removed from use.
Second, CBDC will have expiration date like coupons, and they will be connected with digital ID, that is something we don't have currently.
I see that you don't know anything about CBDC so I suggest reading more before you are making comparions with current fiat monetary system or something else.
Well 99.9% of CBDCs are not even in development stage, they are just being "researched". So there isn't anything to read about and we can't really say what they'll be like or even if they will be created some day!
The small handful that were actually released are in a small scale testing phase and I have not seen any reliable source that confirms the 2 main characteristics you claim the CBDCs have in your post. If you have a reliable source like to Chinese central bank that says it has an expiration date or it must replace cash please post it here.
The two others that I know of didn't have the two conditions either. The Venezuelan one was more of a scam to raise funds and cover the budget deficit for the government experiencing hyper inflation.
The Iranian one that is released and is in testing phase also doesn't have any kind of expiration date. It also can not replace cash in Iran even if it wanted to.