If you were to ask if I would do it, the answer would be no. Mixing species of anemones in general is not recomended however it is done. Some have sucess some people have issues. The issues never seem to be black or white, its just that something is off and often cannot be explained. This has lead to the theory of chemical warfare in which anemones are said to engage in. There are 2 ways that competing species of anemones fight one is physical the other is chemical, either toxins speculated to be released in the water column or the ability for them to release their stinging cells in massive amounts harming your live stock. If they move close to eachother its rarely becase they are being civil and want to meet. If its chemical is rarley seen until ill effects are noticed. Running carbon is often a requirement no matter what but is said to help should this combat happen.
On the flip side there are numerous occasions where multiple anemones of the same species are kept with eachother with no issues. Thats not saying it has never happened but the chances of co-existing are much better with same species. And lastly the greatest sucess rate is with clones of the same anemone as they are not cosidered a different animal. HTH