Pinchy
Blade, not Bladey.
No, it is just a function of age.
Harris retired in 1973 so to have seen his teams play and remember the football, you would have to have been born say before 1963.
Basset's glory years finished around 93 which is 24 years ago, so plenty in their 30s and 40s will remember the good times. Additionally there is more footage of the Basset era available on line.
Harris was a gentleman manager who built a superb team and arguably retired too early. He was a man of his era and Basset was likewise. Why you seem to have this fixation about an either/or choice between them, mystifies me.
I watched great United games under both but was only 9 when Harris left, so naturally have better, stronger and more reliable memories of times under DB.
Do you have fond memories of that fine footballer Wally Fucking Downes?