The Dimensity 8200 ultra was slightly faster and more power efficient than Dimensity 9200+ in tests of the Xiaomi 13T against the 13T Pro. (except graphics)
They are comparable to Snapdragon 8 gen 2, except the 8200 Ultra doesn’t have as strong GPU as the 9200+.
AFAIK Both are faster than Snapdragon 7+ gen 3.