score:4
Both the 2d London Baptist Confession of Faith of 1689 (often called "the 1689" by adherents) and the 1689 Federalism site provide great resources on this inquiry.
In short, the main differences between a "reformed" baptist and a "general" baptist are:
Upvote:2
Soteriology (the doctrine of salvation) is the primary distinguisher between reformed and traditional Baptists.
Most Baptists tend to be "Arminian" (or synergistic) in their Soteriology. That is, they tend to affirm that people have free will in respect to choosing Christ for salvation.
Reformed Baptists tend to be "Calvinist" (or monergistic) in their Soteriology. That is, they tend to reject that people have any free will in respect to choosing Christ for salvation.