The rubber dust caps and what style they are are dead giveaways when it comes to what kind of greasing system is installed. I'm thinking Dexter Axle supplies all of their axles set up that way.
I can make a good case for both types of trailers. Try dropping a boat onto blocks with a bunk type trailer that you rented for an hour for 20 bucks for instance. MANY folks don't want to store or maintain a trailer that's going to be used twice a year. Rentals are a great plan. Those will all be scissor type. I've been all over the Great Lakes and the I-75 corridor from Upper Mich. to Florida pulling one without incident. You do need to be careful when cornering though. Anything stupid will result in a dragged 'toon. And there's no doubt they pull like a parachute.
OTH, you see more and more 'toons trailered regularly, as in every time they're used! Whole different set of circumstance there, and they're nearly all the bunk type. I'll admit that the bunk types will work out better for a lot of road use, especially when pulled by trailering rookies.
Oh, and last, somebody telling me that a 13" tire will "handle" better than a 20.5x8.00x10 would have me wondering about their competency. Sounds like somebody selling a trailer with 13" tires would say.
easier launching gets you floating off the trailer 3 inches quicker..