watchnerd
Level 8 Valued Member
Christian Thibaudeau's Zercher article touches on differences compared to front squat.
The Zercher Squat Complete Guide
by Christian Thibaudeau The Zercher squat can pack muscle on quads and traps like nothing else. It'll also weed out the weaklings. Most people won't do them. Will you? The Squat You Never Do The Zercher squat can build quads better than the front squat. It can jack up your traps better than...www.t-nation.com
Inability to bend the wrist backwards is a barrier for some people against the front squat. The arms crossed over chest version is also awkward.
He seems to think the Zercher squat isn't quite as demanding of the upper back as front squats:
The Zercher position increases the involvement of the whole upper back musculature: the traps, rhomboids, and rear delts. So in that regard, the Zercher squat can help solidify the back during the front squat and deadlift.
If your weakness in the front squat is "losing" your upper back on the way up - your upper back rounds and the bar drops forward - then the Zercher squat will help you.