Except that sons of the new nobility followed their fathers into the army. Lefebvre's son died in Russia. Lariboissiere's son was mortally wounded at Borodino and his father died in Konigsberg at the end of the retreat.
Senarmont's father was killed at Valmy and Senarmont was killed at the siege of Cadiz.
Many of the new nobility were killed in action and either had no sons to follow them or their sons did follow them into the fire and died because of it.
That is a very large difference from the fops who followed in the wake of the Bourbons in 1814 and brought with them the old prejudices against the lower classes and the French Protestants.