Looking at the geometry I think they are not so far apart.
The seat tube length in the catalogue for a 2015 equilibrium is 550mm and the effective top tube 567mm. I can’t find an earlier catalogue.
The Litespeed is 516mm and 560mm.
It would mean an extra 34mm of seat post visible?
There’s a Litespeed frameset on another thread. I’ve a Litespeed myself and they are great. I’ve no interest in the sale.
https://www.lfgss.com/conversations/312391/#comment13925847