I believe the first twin pawl ratchet was patented and made by Duro/Indestro.
A lot of people view round heads as dinosaurs, outdated. I disagree. Most round head ratchets seem to be very strong, e.g. the original, the SK round head, was introduced in the 30s and still made today, I believe the oldest ratchet design still produced. If it was so outdated, why does SK still make them? Answer: because they are a no frills American made tool that will get the job done reliably, as many have done before it.
The only oddity about SK is how the different drive sizes have different tooth counts. I'm not a big fan of them in 3/8, as it has the lowest tooth count around 40 (once any ratchet acquires X amount of wear it smooths out, these being no exception. I have 2 older units from 50s-60s that are smoother than new, and are my favorite SKs). The 1/2 has 50ish teeth, 1/4 is 60 teeth and a completely different animal, easily shining star of their offerings. Then their 3/4 has 72 teeth, lol those numbers just kind of defy logic.
I agree with you about twin pawl units though. My favorite ratchet with this design would be the Wright round heads. I recently got a modern Wright twin pawl repair kit, and put it in a 3/8 ratchet from 1961 that was originally a single pawl. This ratchet is almost tied with my SK Tuff-1 in terms of smoothness, and the tick-tock sound is just right, not intrusive, but it announces its presence. It is a downright joy to use. Also FYI, I've determined Wrights are superior to SK and others for one-thumb direction changes, the trick is to put pad of thumb near outer edge of selector, and give it a quick firm push. Still not 100% foolproof but one handed direction changes are far from impossible like some here will say.
I had a Williams Superratchet, and it just didn't do anything for me, gave it away. I have a 1/2 drive Indestro Super and it has around 50 teeth like the SK, but seems more industrial and sturdier, with nice loud clicks. It is also marked with a patent number relating to a ball detent built into the selector, and as a result this ratchet has the most positively engaging selector of any round head ratchet I've ever touched, bar none. It is too bad Duro/Indestro is gone, if they were still around I bet they would specialize in innovation and offer high quality tools.
All this being said, I don't have a favorite ratchet. I own even amounts of pear and round head styles. They all have their own qualities and quirks. Variety is key.