Can you compare and contrast the antislavery movement before 1830 with the abolitionist movement after 1830?

Antislavery before and after 1830.

There must be many comparisons and constrasts that could be made, but I know of only one of them, so this answer is not going to help you much.  Before 1830 or so, the antislavery movement was nation-wide and civil.  About 1830 or so, northern ablitionists began vitrolic and insulting attacks upon the character and culture of the southern people.  Thereafter southerners felt too much hurt and resentment to participate in the antislavery movement; it became an activity of northern radicals and extremists.

Boyd, William M.  1948.  "Southerners in the Anti-Slavery Movement, 1800-1830," Phylon, 9, 153-163.

Degler, Carl.  1975.  The Other South: Southern Dissenters in teh Nineteenth Century.  New York, chapters 2 and 3.

Finnie, Gordon E.  1969.  "The Antislavery Movement in the Upper South before 1840," Journal of Southern History, 35, 319-342.

Stampp, Kenneth.  1943.  "The Fate of teh Southern Anti-Slavery Movement," Journal of Negro History, 28, 10-22.

Stampp, Kenneth.  1944.  "The Southern Refutation of the Pro-Slavery Argument," North Carolina Historical Review, 21, 35-45.