Perhaps there is room for different interpretations of the word "aggressive" here but the Bore Bright product is most definitely a finer abrasive than the standard compound. I have compared them on a polished specimen and the Bore Bright produces noticeably less dulling and swirls. And using it on a brass lap to develop a beveled crown reveals a markedly slower material removal rate.
Regarding any concerns about enlarging a bore with either one, I can't comment on how much using them on a brush affects the material removal rate but I know beyond a shadow of a doubt that it would take a Herculean effort to remove 1.5 - 2 thousandths with either a mop/felt or a cast lap. Maybe by spinning it up in a drill and scrubbing across the lands, but here's a picture of the only guy I know who could do it by hand...
View attachment 281983 And frankly I'm a little concerned about how those shoulders would hold up.
