I've had both, so I'll have to go on what I prefer...but I doubt I'd get either one for $700.00.
I used to own both a 4" Model 29-2 (44 Magnum) and a 4" Model 24-3, (44 Special). I prefered the Model 24 because with it's tapered barrel, and slightly shorter cylinder, it was a little lighter, and balanced better in my hand. Since I almost never shot 44 magnum ammo, that was a toss-up. I never worried about the cost of ammo. I bought virgin brass and reloaded either cartridge.
However, because I probably couldn't find a 24-3 for $700.00, or even close, I'd probably go with a Model 69 today. I would probably never fire magnum ammo in it.