No shit its cheaper and faster, thats the case with every small model.
It's a trade off between wanting something dumber but fast and cheap, or something slower and more expensive that is vastly more capable and smarter.
The reason the comparison is being made is because Jev and Luna 6 have similar levels of accuracy...
But the thing is that across a lot of classification benchmarks, Jev is actually faster, cheaper, and smarter than Luna (at least without reasoning). For example, look at this one from another user in this thread [1]
[1] https://hard-decisions.anth.us/models/