Well, I wouldn't say the Quran is 'inferior' to the Bible or other way around, that requires a 'judgment' and that's not what either book was written for and of course as judgment subject to bias.
But....if you mean to imply is there a connection between the Quran and both the OT and NT then I'd have to say definitely....yes.
When I read the Quran I was quite struck by how much it references the other 2 works (both OT and NT).
This may not be that surprising as we know the OT was written in the 500'sBC and the NT by about 100AD, the Quran came along much later about 640AD...so both earlier works had been around a long time and were well known when Quran was written.
What also struck me was how in some parts the Quran, although respecting the OT and NT, the religious figures therein etc. seemed to be and even held itself out to be a deliberate 'correction' of the 2 earlier works.....To correct something...you have to know it, read, study it...before writing Quran correct?
I wish we knew more about religion in pre Islam Arabia (100AD-600AD) and how the Quran was written down in the 600'sAD.