Been running mud motors for (25) twenty-five years & currently own (2) rigs.
If you're running a lot of mud, the most important feature you want on a hull is as slick bottom.
No keel, no chimes, no welds of any kind.
Many mud boat manufacturers ARE NOT building boats this way and yes, they are lighter & faster but you give up performance in "the weeds" for what many forget these rigs were built for.
There's advantages & disadvantages to the LT & SD motors.
SD's will give you speed & torque in open water. If you get one stuck in the crap, once you blow a hole around the prop & still don't move forward, you're either pushing or poling out.
LT's lack the speed but when stuck in the crap, you're able to move the prop into different locations to power yourself forward.
One other though, there's a lot of aftermarket parts & add ons for the SD motors. Just remember as you add these high performance parts, you're reducing the life a the motor significantly. Don't believe me, ask your local small engine mechanic that works on these engines for a living & not the salesman trying to sell you a souped up motor or parts.
K.I.S.S.
One of my 25hp LT's is (16) sixteen years old & other than PM, I've only had to replace the head gaskets. In that same time, one of my guides is on his third SD motor.
My preference if a slick bottom hull & LT motor.