I will have to politely disagree with Bonk. While on my recent trip to SA, I stopped the PH during a stalk. "Gee, I wish I had another 4" of barrel on my rifle to snag on thorns, rocks, and bushes!" We had a chuckle. He had taken to referring to my 20" Ruger Alaskan as "Stubby". Handiness - carrying the rifle 99% of the time, and firing it 1% of the time - matters to me.
Mine is chambered in .375 Ruger - purposely designed to replicate the H&H from the 4" shorter barrel. I bet you could tweak the powder burn rate/load to get the same results from the H&H, so you don't need the extra 4" of steel.
I am not overly tall - 5'10" and built like a tree trunk with a 28" inseam. I like the smaller/lighter barrel and action length. As Boddington observes, the hills are getting steeper and the rifle heavier. I was able to slip my 270gr Barnes TSX right through a blesbok's boiler room from a lasered 253 yards with the 20" barrel. It also worked well on a 200 yard running away baboon shot. I really like handy.
If you want the "normal" length of 24", rock on! This is personal preference - both will slay the critters well with good shot placement. There are MANY factors that play into getting to the Goldilocks rifle for YOU. Have a great time experimenting and tweaking to find out the perfect combo for you. Be advised, though - it can eat up your wallet! LOL!!!!!