How a saw cuts is completely down to how it's been sharpened; sorry to mention the s**** word.
Dovetails are rip cut, and you need about 4 teeth minimum in the cut to have a nice cut, this allows you to determine the minimum number of points per inch you need (PPI) for most applications, apart from stuff less than say 6mm or 1/4", 14PPI is about right. The higher the PPI the slower the saw will cut.
The smoothness of the cut face is for a dovetails determined by the amount of set on the teeth. You need almost none for dovetails as the cut in not very deep. IMO the reason to have a dovetail saw is to have a saw with the absolute minimum of set, it's the only real differentiator to it being a tennon saw.
When sawing you should let the weight of the saw do the work, and you just pull and push guiding the blade and don't press down on the blade. For harder woods you need a saw with a heavy brass back. A lighter saw can result in you adding downward pressure to keep the saw cutting. Doing this results in you having less control over the blade and cutting less accurately.
The Veritas saw is a lovely saw, but much lighter than the Pax or LN. The Skeltel saw is heavier IMO than any of the aforementioned, and is more akin to the 'old saws'. A heavy saw is just as happy cutting softwood as hardwood. The only time the weight becomes a problem is on very thin stuff, where the saw can then due to its weight cut too aggressively. Most people for stuff below 1/4" look at using a Gentlemans saw.
The 'blow out' on the backs of the cuts in the article highlighted is in my opinion solely down to amount of set on the teeth. The PAX saw with the highest number of teeth will have less set. It's very difficult to put much set on such small teeth. Most manufactured saws have more set than you need for dovetails, and the higher the PPI acts to limit the extent of the set applied. I can for instance get a saw with say 14PPI to cut with no discernible difference to one with 20PPI, however it will cut significantly faster.
Cutting at a good rate is important as again, if the rate of progress is too slow, the tendency is to weight the blade to make it go faster. Equally as the blade becomes dull, the speed of cut slows, which is more noticeable on a saw with a higher PPI.