Having the same brand, model, size, age, etc. is recommended for RAID0, but definitely not required. It should work fine with the two drives that you mentioned.
Just for testing purposes and to see if I could do it, I made SW RAID0 drives with many different combinations of storage.
I did combinations of one USB the other TB, also USB and FW. I made a one with a 120GB SSD and a 1TB HDD.
They all worked fine. Speed will be limited to a little less than twice the speed of the slowest drive (if doing a two drive RAID0), size would be limited to about twice the size of the smallest drive (if doing a two drive RAID0).
If the RAID0 you want to make will be used for a scratch drive, I think it would be perfectly fine. If you are going to be using it for storage, just make sure you have a back up of the data (general good practice, and not just because it is a RAID0).