Autosomal DNA Tests - STR Versus SNP Based

My first autosomal DNA test done through DNATribes was (short tandem repeats) STR-based (used genetic markers developed by the FBI for individual identification). The autosomal DNA test I am having done through Family Tree is (single nucleotide polymorphisms) SNP-based. I'm anxious to compare the results from these two autosomal tests to see what they say differently (if anything) about my comprehensive genetic ancestry (includes all of my genetic ancestors).