All things being equal, (that is both have the same PTO), the gear is quieter, puts more power directly to the ground and is cheaper to buy. Re-sale value is also lower.
The Hydro makes noise, takes a ton of fluid at changes, is more expensive to buy, but is WONDERFUL for close in work, such a loader, back and forth snow plowing, shuttling equipment in tight places, etc.
There is no one right answer, but in the smaller, sub 80 hp tractors, hydros are far more popular. Most people just don't row crop anymore with their tractor like Pa did with his FEL-less tractor in 1950. His was a substitute for the horse or mule. Today's estate tractor is used far differently.
It is your choice totally.