I thought about that (since, in all fairness, it does seem to be the overriding motivation in ENT, and a major part of why Shran ends up as buds with Archer), but making their (facetious) racial motto and theirs alone boil down to "Because [this other race]!" seemed a bit unfair. ❤
I thought that their performances worked well in both cases, with Tucker being uncomfortable and uncertain of himself as the chief engineer on Starfleet's first real starship, and Reed being a pent-up English pervert (have you got to the episode where he gets drunk and starts waxing eloquent about T'Pol's bum yet?)
Also, if you have any interest in
Stargate, Connor Trinneer shows up as an antagonistic alien in the last couple of seasons of
Atlantis, if you want to compare his performances in different sci-fi settings.
Four tits, and he apparently wanted her to be a hermaphrodite, according to some sources...