Specs on the 24/7 Compact
Caliber: .40 S&W
Barrel Length: 3-1/3"
Action: SA/DA
Finish: Blue
Grips: Ribber Overmold
Weight: 25.4 oz.
Construction: Polymer/Steel
Frame: Large
Front Sight: Heinie 2-dot Straight
Rear Sight: 8 Sights System
Trigger Type: Smooth
Length: 7-1/8"
Width: 1-1/4"
Height: 5-1/2"
Rate of Twist: 1:1:16"
Grooves: 6
Safety: Manual Safety, Firing Pin Block, Trigger Block
Specs on the PT140
Model: 140BP
Caliber: .40 S&W
Capacity: 10+1
Barrel Length: 3-1/4"
Action: DA/SA
Finish: Blue Steel
Grips: Checkered Polymer
Weight: 18.7 oz
Construction: Polymer/Steel
Frame: Medium
Front Sight: Heinie
Rear Sight: Straight-8
Trigger Type: Smooth
Length: 6-1/8"
Width: 1.125"
Height: 5.125"
Rate of Twist: 1:16"
Grooves: 6
Safety: Firing Pin Block,Manual Safety,Manual Safety,Trigger Block
Note the difference in 'action'; the 24/7 is a SA/DA trigger, while the PT140 is a DA/SA action.
Note also that these specs from the Taurus site is wrong on the frame size/length - in my photos you can clearly see they are nearly exactly the same length. And the frame/grip is smaller as well.