Let's start with some explanations:
gf: Gram-force, also called centinewton or centinewon. It can also be written as cN.
,-,±: When a value is followed by a plus or minus sign, or a plus sign, or a minus sign, it means that the following errors are allowed under the design value.
Total stroke: The displacement length of the switch's  (cross column) to complete the entire movement process.
Trigger stroke: The displacement length of the switches to complete the trigger.
Initial pressure: refers to the pressure applied when the switch is pressed and the switches is about to move.
Trigger pressure/operating force: refers to the pressure applied when the switch is pressed to the trigger.
Paragraph pressure: refers to the pressure applied when the switch is pressed to the paragraph point

Black switches
Linear switches
Total stroke: 4-0.4mm
Trigger stroke: 2±0.6 mm
Initial pressure: 30gf min
Trigger pressure: 60±20gf

Blue switches
Paragraph switches
Total stroke: 4-0.5mm
Trigger stroke: 2.2±0.6 mm
Initial pressure: 25gf min
Trigger pressure: 50±15gf
Paragraph pressure: 60±15gf

Red switches
Linear switches
Total stroke: 4.0-0.4mm
Trigger stroke: 2±0.6 mm
Initial pressure: 30gf min
Trigger pressure: 45±15gf

Tea switches (invincible!)
Paragraph switches
Total stroke: 4.0-0.4mm
Trigger stroke: 2±0.6 mm
Trigger pressure: 45±20gf
Initial pressure: 30gf min
Paragraph pressure: 55±25gf

Silver switches
Linear switches
Total stroke: 3.4-0.4mm
Trigger stroke: 1.2±0.4 mm
Initial pressure: 30gf min
Trigger pressure: 45±15gf