Would a BCI or bearded dragon appreciate height more?

I’ve recently ordered two PVC enclosures, one 6x2x2 and one 6x2x3. I’m unsure which enclosure to give to which animal, beardies are more active but boas get bigger.

Also, sorry, I’m not sure which part of the forum to post this in-

I'd give the extra height to the boa, for sure. I've kept both a large BCI and a bearded dragon, btw. Dragons will climb on low driftwood & branches to bask, but shouldn't be allowed so much height they might fall from, IMO. The boa is going to get bigger, & while some climb more than others (they have individual preferences) the fact that they get so much bigger means that even their "low branches" could use the space.