ye the production of a typical SU probably has more than the typical TTG episode though that's probably not a fair comparison. i don't know if it really takes much longer to write, but there's definitely a lot more audio design and other challenges that probably don't apply to TTG
still, most of this hiatus stuff is the result of poor scheduling choices by CN and not the crew's production issues. if we didn't have bombs and promotional events all the time, episodes could be more spread out and we probably wouldn't have 100-day gaps. the idea of having 26 episodes in a season, i'm assuming, is to ideally be able to have one every other week for a year, but instead we're mostly just getting the occasional bomb.
iirc it takes at the most six months to make an episode, and though they definitely work on more than one at once, it's hard to keep up if you try to shove five episodes into a week all the time