the absorption WILL differ as the HCL will cross the Blood Brain Barrier fast, while the Bark will assimilated more slowly yet still will offer the benefits.
Many Say the HCL is better as it is more Bioavalabale.
This may be true but that fact makes it is responsible for alot of the sides reported by Y users.
the bark still has sides, but I believe it to be a better option so long as the Extract is legitmimate
To tell you the Truth a large group dislike Yohimbe period because really its not that well tolerated by many and one can leap frog over its use by using other compounds that are safer.
As an oral no, as a Topical fine (but only a topical with the hcl)