For a S10 swapped AD, vacuum booster will be adequate if you have vacuum.
If you want better brakes put your money into the components at the wheels and a good set of rubber first. The brakes on a 90s 4cylinder s10 are pretty identical in size and design to the 3rd gen v8 Camaro.
Starting point for a mild v8 swap is to put everything into as good as factory stock condition. Common upgrade from stock is dual piston calipers from a 2wd Blazer and a rear disk axle. After that it is just a matter of how much money you have. For best results keep brakes, tires, GVW and horsepower in the same performance envelope
Hydroboost solves a particular problem for a hot rod: lack of vacuum
Yes, they can develop more pressure. They were initially put on medium duty trucks to get more brake pressure without resorting to a huge diameter booster that would not fit under the hood. Boosted cars need either hydroboost or mechanical/electric supplemental vacuum pump. Diesel trucks have made hydroboost a lot more common over the last 20 years.
Putting more pressure into the brake system may make the brakes feel better in that they take less foot pressure, but it does not make the brakes better.