The weight penalty will depend on what the critical margins of safety (or RTR, FoS) and failure modes are. The difference between the two manufacturing processes may effect certain properties differently. For example, in-plane shear stiffness critical applications may have a smaller "knockdown" then inter-laminate shear strength critical applications. As BLS pointed out the low FV of wet layup means fiber dominated properties will have a different knockdown then matrix dominated properties. There are typically no designs where optimization on one requirement results in the overall ideal product, as with everything, compromises must be made. Consideration needs to be made on what the stiffness, strength, envionronment, crashworthiness (damage tolerance), repairability, manufacturability or some combination of all of these (amongst many, many others). Which makes estimating the weight penalty for switching materials difficult to do without detailed knowledge of the design in question.
I would recommend looking at some NCAMP material properties. Remember that some of the materials are OOO and some are full 350 F cure autoclave materials. You can also check out CMH-17 and ASM Vol 21 (Composites), all good references to get you started.