Wolfgang vs. 303 vs PERL for Interior

How does Wolfgang compare to DP in terms of look and shine? Im using DP right now, very matte look compared to 303, almost out. I noticed the Wolfgang is BOGO so that might be a good replacement, but not if its shinier.

Also, WTF is PERL ? I dont see anything named like that listed under interior products.
 
is there anything that can be put over these products to act as a sealer?
 
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