blues are light, reds and browns are just a lot lighter
i'd say blues are slightly lighter than typewriters though, cherry greens may be closer to buckling springs than blues
razer now uses their own rebranded kailh switches, but as KillerGecko mentioned in his post, his blackwidow uses blues, so it shouldn't be too different to any other cherry blue keyboard
razer green = kailh blue recolored = cherry blue clone
razer orange = kailh red/brown recolored = cherry red/brown clone. razer orange switches feel like the middle-ground between cherry reds and browns (if you have tried them before), they aren't exactly linear, but you can't really feel the bump either. maybe the unit i tested at the computer store was a funky one
kailh switches are generally cheaper than cherry switches, which may result in more inconsistencies throughout the board in regards to the weight of the spring in the key switch , how definitive the click/bump is in the greens/oranges respectively etc, but they bear very similar traits to the german made cherry switches