No. That is not true at all. Denis Suarez's performance at Sevilla is much more complete, mature and better in quality than Rafinha's time at Celta. In addition to that, Denis' time at B team was also better than Rafinha's last two seasons at B team.
Deulofeu is much more experienced player, however Adama's individual quality and technical level is already beyond what Deulofeu is capable of now (especially in terms of ambidexterity - Deulofeu is too dependent on right foot therefore very limited when he is dribbling in close spaces). Deulofeu is expected to be given some opportunities next season at the first team. That is because Deulofeu is older than Adama and more senior Canterano. That is not because Deulofeu is more talented and has more potential.
Rafinha was the best young player in la liga last year....... he got the award over Jese.......... he made modric do a split and ran circles around Barca's midfield and defense........
Also I've seen Adama shoot with his left foot once (It was a great goal too). He's faster and stronger than Deulofeu dribbling skills i'd say they are equal although Deulofeu would probably get past more players rn as he has top flight experience.