I by no means count as a buff, but I'll comment.
I don't think one or the other is more creative....but I do like Lennon's solo musical output more than McCartney's.
I find McCartney's too kind of schmalzy for me. because of that, I actually haven't listened to much of it, except what was played on the radio, while I actively bought and listened to Lennon's stuff...so I may be way too scathing of McCartney.
I do wonder if Paul suffered in critical regard because he didn't get murdered though....Lennon has been made into a sort of silly icon (which I think he would deride and scoff at if he were able) by many, and I wonder if this distorts things a bit?
Your generation may well be more objective than mine anyway, because many people kind of divided into the Lennon or McCartney admires while the Beatles were still together.
I liked Lennon's wit and dryness (though they were all pretty sane and funny) and preferred his stuff during the Beatles era and haven't really changed.