I did each for about a decade and there is a difference, though both [hopefully!] are grounded in the same text.
Teaching in the academy in the US tends to be content-oriented, rather than transformational. Professors usually leave the application to individual students, believing that they are now capable of integrating their learning with their personal faith. [They are probably not doing so, the reason many Christian colleges are now stressing that the integration of faith and learning as a course objective.].
Preaching is all about transformation, the more specific the call the better. In fact, I have told students I see the Bible study as a "shotgun approach" to spiritual growth, while the sermon is more "like a bullet." Both are aimed at targets, but the former is wider and broader, while the latter is more specific and penetrates deeper.
I recommend acquiring a good applicational commentary, like the NIV-AC, or a devotional commentary, like Matthew Henry (Sorry, I can't think of anything any newer). Both are good models of moving from text, to principles, to specific application.
Enjoy your new position!
Timothy P. Jenney, Ph. D.
"Lighting the Lamp" Host and Producer
Academic Licensing Assistant
iMac: Late 2014 27" 5k display, 4.0 GHz quad core i7, 24 GB RAM, 500 GB SSD, AMD Radeon R9 M295X 4096 MB, macOS Sierra 10.13
MBP: Early 2011 17" MBP (8,3), 2.3 GHz quad core i7, 16 GB RAM, 480 SSD + 1 TB SSD, AMD Radeon HD 6750M, macOS Sierra 10.13
iPhone 7 plus: 128 GB, iOS 11.x