Hello Guffy,No it's not the same but it will work just fine.
Plus, you have exactly what you are talking about in Berlin Brass.
It may work for you, but it will not work just fine for some others. I can go on and explain why it is not ideal having the same solo instrument playing all the parts, but this has been extensively elaborated here. Yes, I am aware that Berlin Brass has that separate lay out, but again, we are talking about the JXL Brass. I own a few Brass libraries, and I like them all for certain things, and no one's perfect.
JXL Brass doesn't have the separate instruments, I can live with that. However, they must have had a reason to not do it and a solution for people like me who like to write one line per separate instrument.
Tom did mention that he's replaced all other brass libraries he has with his new library. The interest here is to have him hopefully share his thoughts on how he uses it or suggests using it in regards to separate voices / divisi, and such.