6* girls are almost all similar in stats, 16k hp average 6k+ atk average and 2k+ def....

17424 is on the high end for 6* hp with 100% affection (alpina equiv)
6786 is on the higher end of attack figures for 6*s
2416 is also good for 6* defence

Thus her stats at lvl 80 with 100% second affection are about equal to a normal 6* lvl 70 100% affection.
The others you mentioned in the nutaku version tend to fall short in at least one area (Toad Lilly has terrible atk for instance).
Most have high HP stats making their Total Power much higher then their Actual Power.