I haven't used the Jet but in amps it is only slightly larger than the Comet II ( 6 amp vs 5.5 amp).
Those who have used the Jet may disagree but in the Jet vs Nova 1624 I think the time saved in possibly not moving the belt compared to the time needed with lighter cuts and frustration of the smaller lathe would save no time in the long run. This is based on my usage of the Comet vs the 1624. For spindle work I don't think it makes any difference but for the bowl or platters it makes a lot of difference.
"I became insane, with long intervals of horrible sanity." - Edgar Allan Poe