Jimi Hendrix definitely had the bigger cock
The Plastercasters of Chicago say so, and they are the final word on the question.
Grace Slick of Jefferson Airplane recently wrote her biography. She had sex with Jim Morrison and said his cock was only slightly larger than average.
I've seen a photo of the cast of Hendrix's cock, and a few photos of revealing bulges by both rock stars. Jimi Hendrix definitely had the bigger cock.
I must mention that Morrison faked his death and got away with it legally. He told countless people he would fake his death, and that's what he did.
Hendrix died because of incompetent ambulance staff, who sat him upright in the ambulance with his head back, so he suffocated in the ambulance. He was killed, and did not die of a sleeping pill overdose.