Depends on how far you want to go with the detail. If the 20 sheets are duplicates with only minor additional upgrades it might be worth to buy the smalker set.
Your experience with PE is important as well. If your comfortable bending and attaching it then using all 20 frets might be right up your ally, if not it may be an expensive exercise in frustration.
Which ever you choose have fun and enjoy it. If you are able please post some pictures