Monty took a pretty hefty chunk out of my wallet lol, he came from a reputable breeder up here in Canada so I'm not too concerned. What I'm seeing looking at that animal is a really high enchi expression without much yellowbelly influence on the pattern. I think Monty either has lower enchi expression, stronger yellow belly expression or maybe isn't even an enchi at all. Although he has the characteristic eye pinch going on but maybe that's just a coincidence.
I'm really not sure how to explain the color difference between them. I'm pretty sure the pairing that produced Monty was pastel OD * pastel enchi YB so there is a chance he's a super pastel instead of pastel OD or maybe even super pastel OD. It could also be a line bred thing... I'm thinking I may have been a little over my head starting with a four gene male. It's really confusing but I just try not to think about it. With any luck I'll know for sure in like 6 months.