That would be a definite advantage of Design 1 - handlebars farther back and away from the passengers heads.6. Be mindful of your handlebar height as compared to your front passenger's head. Some bike provide way more space than others for this.
What do you guys say?
I have no clear opinion on that. There is at least one bike, the Monark Lon John, that appears to have zero (or almost zero) trail due to the fork with very procunciated rake. Others have positive trail in varying degrees. I already have a good fork, so if less trail is desirable, I should go for a wider head tube angle. Or try your idea wich would be a nice way of getting to know the effect of different amounts of trail on the same bike, through direct experience.60mm trail seems very high