Hard to say imo. When did Tamburini first dream up either of them? The Monster arrived first in '93, its massive sales saved the company from bankruptcy therefore paying for the 916 to be made.
No noticeable consumption so far. I have no service history but I think it was looked after very well for most of its life and wouldn't be surprised if it has been rebuilt at some point.
The 916 definitely gets more attention, as mentioned it crosses over to a non bike audience. The monster has an important place in Ducati's history but wasn't as ground breaking.
