I'd say get whichever one you can find with a claycourt sole.
The allcourt sole is not very suitable for clay. You may not feel you're missing anything, but a proper sole adds so much more traction, it's a day and night difference.
You could also try the omnicourt sole, which has even more traction and is more suitable to smashcourt and artificial grass.
If you can find both with a claycourt sole, I'd opt for the solution speed because of their lightness, and since you're playing on clay, durability is not really an issue, and you also don't need as much stability as on hardcourt.
Or go for the cheaper ones, they're both great shoes anyway.