Stackpath is cheaper on bandwidth, mostly because of scale. For video based applications, this is a big deal (and we work with video companies to try and get better bandwidth pricing). For typical web app servers, bandwidth is usually not a very large expense.
CPU based pricing is pretty close. We've heard our CPUs are higher performance, but haven't done any real testing. The people who run high CPU apps on us _tend_ to pay less because we scale up and down so quickly.