ORIGINAL: The Lone Wolf
Big Ol' Bucks - Your comment regarding weight is incorrect. Lone Wolf has lighter-weight stands.
Lone Wolf Hand Climber - 14 lbs.
Lone Wolf Sit & Climb - 18 lbs.
(cut hang on stands because question was about climbers)
All stands are also rated to 350 lbs.
Since you are implying that the Lonewolf stand are lighter I thought it only fair to give the weights of the Summit stands
The Summit Viper X5 is a Sit & Climb that weighs 20 lbs. This one is heavier but more comfortable. Depends what you are looking for in a stand. No one in their right mind would argue the Lonewolf is more comfortable than the viper X5. As much as I like Lonewolf stands I would not buy their sit and climb over a Viper X5. To me the Lonewolf advantage is in their lightweight packable handclimber. Lets compare that weight to the summit.
The Summit Openshot (handclimber) weighs 14 lbs also! It would appear that you are incorrect for stating the Lonewolf has lighter stands. It would have been better to say some of the Lonewolf stands are lighter than the Summit counterparts.
Either way these are great stands. If I was going to get a Lightweight handclimber and the price was close I would get a Lonewolf( I have never used the Summit OpenShot though- it may be great and probably more comfy). If I was going to get a Handclimber I would go with the Summit Viper X5 or Razor X5.
Summits rates their stand to 300 lbs so this could be a factor for some of you heavy boys.