The RAF is generally more comfortable and practical, as you don't have the bottom keeper that limits where it can sit on the strap. The G10 has the 2nd piece (keeper ended) to ensure the watch head doesn't slide down the length of the strap - for example, if you were suspending it on something.
You could always get a G10 and cut off the 2nd bit if it didn't suit, but that depends on how handy you are with a blade and a lighter. Hope that helps.