I got this disc in 174 Tournament plastic when it came out in March, 2014. At the time, I was only thowing about 275 feet, which was largely due to taking a year off of discing (so lack of form), as well as there still being snow on the ground here in Wisconsin; which makes anything faster than a speed 12 difficult to near impossible to get up to full speed. Either way at the time I first tried this disc, with the amount of power I had at that time, the World was nearly indistinguishable from my 175 gram glow champion Boss; and since all of my other discs were also glow champion Innova discs, I stuck to using the Boss for the majority of the 2014 season.
Near the end of the 2014 season I discovered how much I love Trilogy plastic, so I began to transition from Innova to Dynamic/Lat64/Westside, but I struggled to find an adequate replacement for my Boss in Trilogy plastic. I tried an 175 gram glow lucid/moonshine Trespass, but I lost confidence in throwing it into a headwind; as it would turn over way too much, but it always would come back to the left (RHBH). Frustrated, I tried an 173 gram Lattitude 64 Stiletto in opto plastic next. I still have this disc in my bag, but it is impractically overstable for me to throw RHBH, unless I'm dealing with a huge headwind or throwing sidearm.
When the Trilogy released Fluid/Frost/Elasto plastic, I was curious and bought a 174 Elasto World; especially since I had gained 75 to 100 feet on my drive since the last time I tried it. When I first went to try out the Elasto World, I brought the 174 tournament World along too, just to see if there was any noticable difference between the two plastics. The profile of the discs looked identical. They have the same amount of dome, same underside wing thickness and shape; unlike the differences you'll notice between Innova's DX, Champion, and Star plastics, where the DX and even Star versions of each mold will have a much larger dome than the Champion version. Regardless of which plastic it is, the World's flight path does not have any noticable change when thrown into a headwind. Period. There are slight differences between the two plastics, and after about 2 throws with each World in the different plastics, I couldn't decide which one to keep in my bag.
The Elasto was noticably more grippy and the flight plate was slightly more flexible (reminiscent to a pop-top kind of feel), but to my surprise it was still more high speed stable than the 174 Tournament plastic version. Regardless of release angle (hyzer/flat/anny), the Elasto has just a touch of very slow developing turn throughout the majority of the flight, and then it will begin to go into a gradual, but fairly strong and slightly foreward penetrating fade. All I can say about the flight characteristics of the Elasto World is that it is extremely smooth, and I'd give it flight numbers of (14,4.5,-0.5,2.5).
As alluded to above, the Tournament plastic is slightly less grippy, and regardless of release angle slightly less high speed stable, as well as having just a touch more glide. Similar to the Elasto version of this mold, the high speed turn is gradual, and happens throughout the majority of the flight of the disc. Because of this, and combined with slightly more glide, it's hard to really tell how much more the tournament version of this disc has turned over until right before the disc begins to fade out just a bit more agressively than it's Elasto counterpart. Overall, I'd rate the tournament version of the World as (14,5,-1.5,3).
If you had to take anything away from my long, drawn out, and boring comments, it would be this; I would highly recommend this disc; especially for anyone with 350 ft+ power. It is a fantastic mold, and regardless of which plastic you choose, it is grippy and feels great in your hand. Even if you don't have 350 ft+ power, it's still an awesome disc that will hold a line amazingly in a headwind.