The first time I hiked to West Baldy I mistakenly thought it was Mt. Baldy until I reached West Baldy and looked back. When I reached what I later learned was Mt. Baldy from the Devil’s Backbone Trail, there was only a publicly affectionate young couple on the summit who I didn’t want to disturb. It turns out they were blocking my view of the summit marker. Looking south I saw what appeared to be a higher peak and assumed it was Mt. Baldy.

View of West Baldy (elevation 9,988′) from Mt. Baldy (elevation 10,064′). Note: photo is taken from just below the summit marker.
So, I headed down along what turned out to be the Old Baldy Trail that leads to the Visitors Center. Near the saddle I realized I needed to head over to the ridge where I found the West Baldy Trail which I learned on the way back directly connects the two summits.
Reaching what turned out to be West Baldy and looking back I realized I was on a shorter peak.
I find it an interesting illusion and worth the short 1.1 mile round trip to fully experience.