The New Yorker brought me here—their review of McMurtry's bio was full of surprises for me, and intrigued me enough to pick up the book that one of my all-time favorite movies was drawn from. My takeaway? One of those rare cases where each hold its own, and they probably enhance each other. There's definitely no clear "better"—if you liked one, you'll "enjoy" the other (they are both sad af).