same for me: Broomstick Bass (with its drums) for testing, and EzBass for serious ( 
) jobs are way better
Now coming to UJAM Sparkle, it can output good stuff, and I think this may improve using it without Scaler (i.e using bare hands on), but matching it to Scaler requires a too different, and less easy, setup compared to AAS Strum-GS 2