In reply to itsThere: The reason you haven't got any replies, is probably that you are asking poorly worded questions without nearly enough details, either in the post or on your profile.
I'm afraid the general conclusion I draw (rightly or wrongly) is that you don't really have much clue about what you are asking about.
In short:
- for the average climber (i.e. leading HVS rock) it would be fairly silly to consider G20s or G22s for Scotland.
- Rambo 4s are slightly better choice than G20/22 but would still be a poor choice for most UK climbers (at least as their only pair of crampons).
- G14s are a great all-round crampon for Scotland and will cope with everything for easy snow plods up to anything 99% of use will ever climb, however Petzl Lynx and BD Cyborgs are possibly better options (if they fit your boots).
The long answer:
The main advantage of a fully rigid design (e.g. Rambo 4) is when climbing bullet-hard water ice, as you may get more penetration. They are also good for high-level continental style mixed routes (M8 upward) where you might want to use their heel spurs and hang upside down from them.
I doubt you will be climbing many M10s, so unless you plan to spend loads of time in Norway/Canada there is probably little reason for Rambos to be your first choice. (IMO Black Diamond Stingers are a better dedicated mono-point option for Scottish use.) Compared to G14s, Rambos are slightly lighter but they are also less suitable for easier mountaineering use. However, Petzl Lynx and BD Cyborgs are also lighter than G14s meaning that weight alone would be a poor reason to choose Rambo 4s.
As regards the G20 and G22, you would need to be very sure of your priorities (either hard mixed or hard water ice) to even consider them. The G20 would be excellent for Scottish mixed grade VII upward but would be a very poor choice most routes in the range grade III-V having absolutely NO laterally orientated points for steep snow descents. Equally, the G22 might excel in Norway or Canada on routes WI5 upwards but will have little if any utility in Scotland. In both cases, the Petzl Dart/Dartwin could be a better (albeit still not perfect) option for Scottish routes, mixed and ice respectively.
If really want to spend loads on money on shiny gear, go and see how well a pair of Petzl Lynx will fit your boots. Equally, if this is your first pair of crampons I'd suggest you consider just buying some Grivel Air Techs for £89.50 (see
http://www.ukclimbing.com/forums/t.php?t=535027 ). For 90% of UK climbers, they are more than sufficient.