192 reversals compared to 78 is not a rate, it’s just a number. 192 reversals out of 242 cases gives a reversal rate of 79%. 78 reversals out of 106 cases gives a reversal rate of 73.6%.
The sixth circuit has 71 reversals in 88 cases, a rate of 80.7%. That’s the highest of the circuit courts (and the ballotopedia site shows that in a chart, right before it actually states it outright).
If you want to compare the pure numbers of cases heard and reversed, you also need to consider the circuit’s case load. The ninth is huge, and hears more appeals and issues more decisions than any other - roughly 11,000 per year compared to around 3,000. With 3.67x the caseload, you could reasonably expect that 3.67x as many cases from the ninth would go to SCOTUS, If my math is right, the other circuits average about 66 cases reviewed (ranging from 37 for the first to 106 by the fifth) compared to 242 from the ninth. And it just happens that 66 x 3.67 equals exactly 242.
So…while the number of cases from the ninth that are reversed exceeds the other districts, that’s simply a matter of scale (scale also dictates that the ninth has more cases affirmed than any other circuit, and - by a wide margin - more cases that aren’t even accepted by SCOTUS and allowed to stand). The number of their cases accepted and reviewed exactly matches what would be expected based on caseload. Their reversal rate is at the high end, but isn’t the highest.