the f50 is the lightest by far but they cost more ... the f30 is in the middle between f10 and f50 it is lighter than the f10 and then the f10 is the heaviest
F10's are more cheaply made and are less durable. Yes they cost less but they will fall apart sooner and you'll be spending more money buying another pair of cleats next season. If you buy F50's they are more expensive but last longer so in the long run you'll be saving money and getting better quality.
There is no such thing as a F10 tonado. It only goes up to a F5.
Hit F10 again...if it doesn't get fixed, hit F8.