Why is it when Oscar defeats Ike Quartey, it is considered a major win for ODH but when Vagras defeats Ike Quartey it is merely overlooked.

He beat

Winky Wright
Ike Quartey
Raul Marquez

and a few others include

Javier Castillejo
Luis Ramon Campas
Wilfredo Rivera

so yes, he has a few big wins in his career