Hello and thanks for researching this very important question!
These two animals are indeed separate species...they come from very different parts of the world.
Trying to put them in the same enclosure, or in any social setting, would be very dangerous for them both. This would be something like trying to introduce a field mouse and a mole. Although they have similarities that place them in the same animal "family", they do not recognize each other as the Same.
Here are a number of reliable links where you can get more information about various hamster species:
http://www.sunseed.com/artccat46MYIS73.html
http://www.hagen.com/usa/small/info_sheet.cfm?CAT=61&INFO=36
http://www.hamsterific.com
http://members.shaw.ca/petitepaws/chdwf.html
If you need additional support at this time, please click "Reply".
Your concern has touched me--if you have follow-up questions, or need to clarify your case, please let me know right away! Your "Accept" helps me reach out to others!