Those two designs are going to fit much different anatomies, so the only useful opinion here will be your own. If you know the distance between your g-spot and your clit, and how they're oriented to each other, you'll be able to figure out which toy will work. If you don't know, figure out what dual stimulators in your collection work already, or if you only have failures, those will work too -- bring them to the screen, and use the 'view actual size' feature to compare them against one another. If Toy X is too long, then the new toy needs to be shorter, etc.
Good luck.