Well at least dead keta still gave us our badge and a tm(yep corey).And somehow marianette's badge is also valid.If we had those in reborn we would have completed the league alread. The level cap is currently a little high in rejuv compared to reborn.Also it is stated that reborn takes place years before rejuv.But yep reborn is way more realistic than rejuv(time travel,splitting souls,immortalit, etc). In fact reborn might be the most realistic pokemon game ever.