Attached below please find a perspicacious analysis from a Mainland scholar about suject two concepts. 

http://www.toutiao.com/a6422305066133422338/

Please focus on the conclusion: to the author Taidu and Dutai make almost no difference.  Well, to me they make no difference, either.  Let me tell you guys, I believe such a conclusion, to some extent, reflects the common consensus of China's Mainland about the political status of Taiwan.  Dear islanders, you'd better get to grips with this new situation.