Gmc Sierra Double Cab lease

Hello all…
Looking for residual, money factor and incentives on a 2016 SLT Double cab. My zip is 48328 in Michigan. 24 month lease with 15000 miles per year. I had one dealer tell me 478 and another 605 per month. I get employee pricing. The msrp was 53k and the employee price was 47k.

Not sure why such the difference. The trucks quoted were identical.

Thanks for the help.