Sampletank is one of those synths that depends on the sounds you own or have available.

If you *have* those patches it may very well do fine at the sounds. However, the default (basic) sound sets may not include what you are looking for.
Also it is customizable/expandable so the answer, even with known variables, is still subjective.

When you ask if it "produces better and more sounds" for your desired instruments it is a very hard question to answer.
My Roland synth has (in my opinion) 'better and more' muted brass instrument sounds, but others may think Sampletank has better ones.

The thing to remember is Sampletank is only as good as the available library of sounds, and this depends on what you have downloaded for free or purchased. It can use a LOT of different samples. However you have to be able to make them available for it to use.

I do not work here, but the benefits are still awesome
Make your sound your own!