Have you seen the 46 game thread? Has a lot of stats in it comparing IB and NA.
https://boards.footymad.net/showthread.php?t=38287255
Ultimately if you include the season we were relegated into this division then IB stats are notably better. If you don't then after tonight I think NA just has the edge.
For me the quality of play (and general entertainment) under IB is lots better. But results wise they're close. And like many fans, I'd happily see a bit more directness at times and a bit more steel in midfield.