DHT Blocking with oral finasteride and the various topical versions

Which has more efficacy on DHT blocker between topical finasteride and oral finasteride? Please let me know thanks

The Liposomal topical finasteride stays where you put it and very little of if  goes systemic as most other topicals do.  If you apply it in the front but are thinning in the crown, it will only work in the front.  If you take the pill, then it gets everywhere as effectively as the topical does were you apply it.