Ryan McGinley and Spencer Tunick

The other day my husband asked me, "what's the significant difference between the work of Ryan McGinley and Spencer Tunick?"

He continued, "they both construct nude-filled landscapes."

At first I laughed, but the more I thought about it...

San Sebastian 5 © Spencer Tunick

Tree #3 © Ryan McGinley

Is the difference a sense of order versus the illusion of spontaneity? Or, is the difference merely that Ryan McGinley chooses hotter models?

Thoughts?