Ok roscoeheads look past the sloppy playing for some comparison sound clips. My Ash Body, buckeye burl, skb5316 top came with the standard bart/bart setup. I decided to try the aggie pre and compare the two. It is just as what most people have said (thanks to Jome and Gard and others) that the bart is a little more fuzzy and more compressed. The aggie realy opens it up and the mid contol is alot more usable for this ash body bass. The sound clips are embarrasing but in the effort to help other Roscoeheads I humbly post these.
0- flat, with full blend
1- flat, with full blend
2- flat, full bridge (my fingers had glue on them, a bit sticky

)
3- flat, full neck
4- flat, with full blend
I must say I like the aggie better for this setup. Flat is not the ideal sound for slap, but if I cut the mid and boost the treble and bass this sounds great. I really like the slap tone better and the fingerstyle in both the bridge or full blend. I like the tone of the bart better for bridge pickup alone.
http://www.vsbass.com/cory/
This is TBer Vic website so he may not keep them up very long so if you want them, you may want to copy them.