What are the differences between Studio Brass and Studio Brass Professional?

Spitfire Studio Brass features 8 essential instrument patches with 130 articulations to choose from, all available with the default Decca Tree microphone position. With Professional, you have access to 9 more instruments, 260 articulations, as well as seven extra unique microphone positions and two stereo mixes:

Spitfire Studio Brass

• 8 Instruments
• 4 Solo instruments
• Tree 1
• Up to 4 round robins

Spitfire Studio Brass Professional — all of the above, plus:

• 17 Instruments
• 13 Solo instruments
• Close 1, Close 2, Tree 1, Tree 2, Ambients, Outriggers, Mix 1 and 2