I looked this up on samsungs webpage and IMO the non-costco model is better here is some copy paste. The s24b240 first Display 23.6" Wide Screen Size
1920 x 1080 Resolution
250cd/m2 Brightness
5ms (GTG) Response Time
1000:1 Static Contrast Ratio
Mega ∞ DCR
170˚/160˚ (CR>10) Viewing Angle
Matte Black Cabinet
Inputs VGA
DVI
Included in box
DVI CABLE Power Power Consumption: 30W
Max Stand By Power (DPMS): 0.4W
Power Type: AC 100-240 ~ VAC (+-10%), 60/50Hz +-3Hz Weight Product Weight (w stand): 8.58 lbs.
Shipping Weight: 10.78 lbs. Dimensions (W x H x D) Product Size With Stand: 22" (W) × 17" (H) × 8.8" (D)
Product Size Without Stand: 22" (W) × 14.2" (H) × 1.9" (D)
Shipping Dimensions: 24.9" (W) x 22.5" (H) x 17.4" (D)
Now the Costco sb300xxx model
Design High Gloss Black Cabinet Display 23.6" Wide Screen Size
Resolution: 1920 x 1080
Brightness: 200cd/m2
Response Time: 5ms (GTG)
1,000:1 Static Contrast Ratio
Mega ∞ DCR
90°/65° Viewing Angle (Horizontal/Vertical) Features Magic Angle
Special Features: Eco Saving, Multi Screen S/W, Samsung MagicAngle, Samsung MagicBright3, Samsung MagicColor, Off Timer, MagicTune, Customized Key, Image Size Inputs VGA
HDMI Power Power Consumption: 30W
Max Stand By Power (DPMS): 0.3W
Power Type: AC 100-240 ~ VAC (+-10%), 60/50Hz +-3Hz Weight Product Weight: 8.36 lbs (With Stand)
Shipping Weight: 11.66 lbs. Dimensions (W x H x D) Product Size With Stand: 22.4" (W) x 16.4" (H) x 7.8" (D)
Product Size Without Stand: 22.4" (W) x 13.5" (H) x 2.1" (D)
Shipping Dimensions: 27.2" (W) x 16.3" (H) x 4.4" (D) Included in Box VGA Cable | 
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