If you listen to the normally awful Rest is Politics 'leading' podcast - the episode with Ben Wallace - you'll see an interesting comparison between Johnson and Ken Clarke.
Wallace was Clarkes' PPS and really liked and respected him, and he also likes Johnson, and served under him while Johnson was PM. He is unequivocal that Clarke was the Thatcherite, while Johnson is far more of a Keynesian, but that the Tory party, and wider politics to an extent, has muddied the waters of what's right and left by over-laying leave-remain on the normal spectrum, which somehow produces the result that Johnson is seen as more right wing than Clarke, which in economic terms is just delusional.