Affini technology is generally excellent. Regardless of the domain, they're likely to have the most advanced version of any given technology around, though not always. Some other civilisations may manage to outstrip them in certain areas, especially if it's a notable speciality for that species, but there are very few species that can claim to have the breadth and depth of capability as the Affini do. (In no small part because any civilisation which does outstrip them in some area will soon be happily contributing that capability for the good of all!)
Aesthetically, Affini technology typically leans on bio-technological and organic imagery more than our style of technology. Ships are often at least partially grown, and much of their most advanced technology (like the haustoric implant) is bioengineered material.
Affini tech is also incredibly safe! Codes and regulations make it nigh impossible to hurt yourself with a piece of affini tech. The Compact's desire to keep every sophont safe and cared for is built in to every bit of technology they produce. Affini tech can detect misuse and deny/chide sophonts for attempting it.
Affini have mastery of the 5th fundamental force, something that the terrans hadn't even discovered yet. From impossibly durable hulls, to atomic compilers, to their jump drives, it is utilized constantly. The Accord never stood a chance.
See also the known Affini ships
Terran technology is typically inferior to Affini technology, but generally superior to modern day humanity. Ships are relatively small and the crew are typically either in microgravity, or attain a sensation of gravity via spinning sections or acceleration. In either case there are significant limitations, as spinning sections on small scales cannot achieve high gravity without compromising comfort and acceleration requires constant thrust.
Aesthetically, terran technology trends towards hard sci-fi themes based on semi-plausible technology, with the exception of faster-than-light travel provided by point-to-point jump drives, close to Battlestar Galactica in style.
See also the known Terran ships