Connection issue b/w two soundcore devices

Hello Everyone am trying to connect motion boom with Rave party casy, but they are not pairing together
Can you guys pls suggest?

I do not do speakers as much due to my son condition…

I do not think you can pair those together.

One has TWS and the other has Partycast (that allows up to 100 to be paired).

If I am wrong, there should be a few who may answer as they do the speakers better than what I have.