Silurana are tropical.. so right there the water temperatures don't mesh well with X. Laevis. X. Laevis is larger like Geoff and Tony have already stated. They could probably co-exist but don't expect a long happy life for some of your frogs, so why bother?

Keep'em separate, different species, different needs.

Cardinal Rule #1 with keeping amphibians is you don't mix amphibian species in the same enclosure.