To Assign or Not to Assign

[Rachel Murray]

I'm getting my wholesaling contracts together and am wondering how wholesalers decide whether or not to use assignments of contract. Basically I'm seeing two options for structuring a wholesale deal and would like to know how/why you choose one over the other. 

OPTION 1: Assignment - Seller signs purchase and sale agreement with an option to assign, buyer receives assigned contract at closing (buyer, seller and wholesaler are all in closing room together). 

OPTION 2: No Assignment - Seller signs purchase and sale agreement with wholesaler for $x, Buyer signs purchase and sale agreement with wholesaler for $y, double closing at title company (end buyer and seller never interact)

Thanks in advance! Located in Michigan.