How comprehensive do we want to be with alias models? Leixen sold the same exact radio (from everything I can see in the images they are a binary match) as both the VV-898S and VV-898E. Should I bother making an alias model for the 898E, or do we just markup the web page to note that we support the model and it matches the S? Aliases make a lot of sense when the vendor name or model are grossly different, but I'm not sure it's worth doing in this case.
I think the most important use for an alias is when the things are so different that someone wouldn't think to use the right driver. Like, if two manufacturers release the same radio under different names -- that's a good reason. Just the trailing character is probably not a good reason. I'd even say just drop the trailing character from the driver itself to reduce confusion (i.e. name it VV-898, not VV-898S).
--Dan