RE: Trinity Vs. Odonnels
I've run tons of fuel brands.
For performance in racing you'll find best results with O'Donnell over Trinity. Trinity's problem is they don't make the fuel and they do not use just 1 fuel producer, so from 1 batch to another it can vary.
Trinity is cheaper than O'Donnell though.
Personally I've switched to Sidewinder Pro Race. Same tuning and performance of O'Donnell, but cheaper. It also has a tint to the color allowing me to see the fuel level easier.