Well well, pretty interesting 1st round matchup... For me the edge comes to Nino at home as a WC-player with the conditions because they are so HOT and humid thru all day long - it is some special matches in night time here. I know Taberner is the better player from these two and showed his level to be there top-50-100 on clay, BUT he is yet to burst into ATP-level. I liked what I saw from him at Hamburg.
I have been watching Nino on clay this year - he is so good server and good from baseline with his FH-side, at least on CH-level, and behind his 1st serve it's hard for opponent. He is not anything that special, but had some talent in juniors. I just like his game, and imo he can challenge Taberner here in these conditions. Recently he has had some good results which I noticed. PS. prob +4.5 and earlier there was O19.5 line open are legit too.