Gunboat is better. I'm not sure if you can enhance the contrast, might be better. For Venezi text, I'll suggest a gradient instead of a single tone of color. Venica is still very pale, but already better... I'd think about adding some sort of light within the text itself instead of enhancing the contour.
Gallia signature is nice. Has a cloudy feel to it. I like the lines around the GRN text, but it feels a bit pixelated when you look closer. The engine exhaust effect is... too bland? It has only a single color tone. Needs more, and perhaps, a stronger shape. I'm not sure if you have an appropriate abstract brush to give the impression of engine thrust, it would look probably better.
Note: It's Korolia. Think, Toyota Corolla, you know.