Bill,
I think they're different features in form and function, and the configuration of the two greens are quite dissimilar.
For a good number of years I've played a par 3 with a mound intruding into the left side of the green.
When the hole is cut behind the mound, the approach shot is dramatically different, and harder, than when the hole is cut in front of the mound, and, that's on a green lacking a punchbowl like configuration.
It's clear that Crump always intended that a pimple/spine like feature inhabit that green.
Without it, the green is underwhelming with respect to approach and recovery shots.
And, long putts are of no inordinate challenge, whereas, the restoration of the pimple/spine would create substantial challenge on and to the green.
The second photo seems more enlightening in terms of getting a more thorough perspective on the feature