Let it grow and take a close up photo of the fronds and post.
The best way to identify a moss is by their fronds. It is important to ask for photo before you buy and compare the moss you are buying on aquamoss.net
I bought christmas moss twice in a row in the past only to find out they were christmas moss. Ive seen moss sold most of the time as Christmas or Singapore but they are peacock. or peacock moss as taiwan. The IDs got all mixed up when one seller pass the wrong ID to another and it multiplies. Thats why I make sure that I grow my moss with correct species.
I grow Taiwan, Peacock, Singapore, Christmas. mini christmas, fissidens, etc.