SaaS reseller agreements are different, but not fundamentally different from software reseller agreements; in fact I suggest they are pretty similar.
Either way though, talk to an attorney that is well versed on Software and SaaS reseller agreements, and the differences between them. Below are several SaaS reseller agreement blog posts that are worth a read.
What Does Your SaaS Agreement Say About Your Company?
What SaaS Customers Expect in their SaaS Agreements.
Read more about my drafting style here too, as simpler and shorter reseller agreements can make a real difference!