Dear, In every company the sales letter and the sale promotion letters are not the same, every company used to write according to their own structured defined context and formatting, but the main difference between the sales promotion and the sales letter is that in sales promotion letter your boss would be going to write as MR ABA is being promoted to grade 1.2 etc but the sales letter could have anything according to the sales issue etc. This I have told you according to my company in which I am working as a Sales Executive.
