@Turbo98, this is what I remember from reading many posts on this site ... still need to be taken with a grain of seasalt
1) "Fuse or Snake": L&S cooking, 5-7 hrs duration, no coal adding (but can w/ difficulty), can get to 275 but best at 225, Cost = $0.00
2) "Smokenator": L&S cooking, continuous duration, must add coal (& water if using water) every hr, can get to 275 but best at 225, Cost = $65ish
3) "Slow-n-Sear": L&S cooking, continuous duration, must add coal (& water if using water) infrequently, can get to any temp you want, Cost = $80ish
H&H cooking, heavy heat for searing, slightly less room on grate than Smokenator.
4) "Vortex": L&S cooking, continuous duration, must add coal as needed, can keep in the L&S range, Cost = $??ish
H&H cooking, intense heat within the "cone" of the Vortex, good placement ability withIN the kettle, some cooking grate space restrictions.
Hope this helps a bit. These are ALL good utility tools to enhance the ease and quality of your cooks (like warming seats in your family car).
On a personal note; I own and have used all of these add-on's except the Vortex. I've used the "Fuse" method for years to make cooks in the 14 hr range ... I kind of cheat by using two kettles, when the fuse is down to about 30min on one I just start another fuse on the second kettle and when it's up to temp I put the whole cooking grate over there to maintain my Pork Shoulder cook
SJ