Please read my Original Perroquet review for details, as this is a comparison.

In a nutshell, I did a side by side sample of both versions, and love them both.
The oak barrel version is smoother, and bit more mellow and balanced. The same heartbeat is there, but the aging has toned down one or two sharper elements into a warm, rounder, refined absinthe that I am sad is not going to be reproduced! I do detect a tiny bit of oaky flavor in the taste, but it is not strong or overpowering...more of a nuance. I would give the flavor a 4.5 were I allowed to, as I like it a bit more than its oakless sister.

I will continue to drink Perroquet, despite the lack of oak barrel bottles in the future, as I love its grape base, and enjoy the flavor and finish quite a bit.