I have both 329s and M69s. Have shot both extensively.
The 329s were my all day, every day carry gun for the better part of a decade. These are very specialized platforms. The have a very useful power to weight ratio but due to the weight, sights, and recoil are more difficult to shoot than steel guns. They are also more fragile than steel guns. If shot extensively with moderate to full magnum level ammo, they will require more frequent repair/maintenance. With .44 specials, durability probably isn’t an issue. The Hogue 500 X Frame grips help moderate recoil significantly.
The M69s are more recent additions (bought the first 4 ¼” gun in Q1 of 2014). Recently, I added the 2 ¾” version. I’m a big fan of the 5 shot L Frame .44 Mag (Model 69). It is is FOR ME, the perfect revolver platform/cartridge – accurate, powerful, compact and fun to shoot (wild to mild). Equipped with the Hogue 500X frame grips and with the lower bore to grip axis, recoil, even with full on .44 Magnums is quite manageable, stout but not terribly harsh.
Some consider five shots to be a negative, FWIW, it isn’t for me.
If I could have only one handgun, it would be the 4 ¼” Model 69, although I still carry the 329 when bow hunting elk in big predator country.
Good luck with whatever you choose.
Paul
Threads more fun with pictures:
329
M66-8, M69, M617