I seem to remember 98.1 doing better than Rock 103/Rock 102 for quite some time now. The two aren’t quite the same format, though, or at least they weren’t the last time I listened.
98.1 tended to be a little bit hampered by having its transmitter in Arkansas as it was licensed to Osceola and had to find a way to cover the bulk of Memphis while also hitting its COL. That problem, of course, was solved in 1992 after it moved its COL to Millington and moved onto the main transmitter farm. It has had fewer changes since then, though it still tried making a go of oldies/classic hits under a few different names when the imaging wasn’t the real problem.