Dozer. JD850, D65 Kamatsu, International TD15, Cat D7, etc. Something in the 150-200HP range with 8 ft blade
Track loaders almost always have street pads. Moving this much dirt that far you need pads with cleats.
What does cleats have to do with scooping it up in the bucket for transport?
If you're gonna scoop and go with it, not much difference although he did say it was soft in the area where the dirt is. But, in all my years of moving dirt with loaders and dozers I have always been able to push more efficiently with a large dozer vs scoop and haul with a loader.. Possibly because the dozer on site was always a lot bigger than any loader on site.