I have been carrying a wood inlaid Mnandi (Old pocket clip style, old nail nick- I had to go this route to find my first borns' birthday) for my M-F work week (education) for just over a year. Pocket clip is awesome (styling) and grabs, I would say, better than other CRK clips. Almost to a point of grabbing to well. I have been nervous about dress pants, but without issue. I too was suspect of its smaller size, but my job also puts me into minor repairs on school and activity buses and I have been nothing less than impressed with durability and performance. I have been pretty ruthless splicing wires, cutting plastic, radiator hoses, cardboard, and vinyl. For my summer months and weekends I prefer to carry either a large or small plain regular sebenza or Umnumzaan... also, with my kids' birthdays which took me a ridiculous amount of time to find and over paying for specific knives's birthday when I could've purchased the same knife for $100 less with not the proper date. Not all the years are correct, but I'll get there maybe some day. First boy was born on a Monday, not too hard, and second had to come on a Saturday. Little turd has been a pain ever since.
I believe the only non-wood you can buy is a carbon fiber inlay. Although, I was originally scared of the wood inlay as well, I will say it has held up amazing and has no scratches, gouging, and hasn't darkened as I originally though it might. Mine is Cocobolo which is no longer available. I was recently really concerned when I accidentally sent it through the wash about possible warping, but it came out fine and still clipped into the pocket. I did, upon realizing, take it apart, wipe down the knife and parts, and re-lube the pivot. I wouldn't recommend sending it the through the laundry, but I honestly think it may be cleaner now.
I believe the new clip has the same retention properties as the old clip style with only decorative (IMO) improvements. However, many that I agree with, have stated that the old style nail nick is easier to open with one hand. This is not to say the new nail nick can't, its just easier from my experience.