Newray & Maisto are on par, both look like toys. Newray tend to get dimensions a little more accurate, Maisto have rear suspension, that's the only trade off.
Your model (same as mine) is the F with E graphics because at the time, they made the green F2 like the minichamps one. Being a cheap toy, they'll only make a certain number of parts & just change the colours or fairing/tank/tail for each manufacturer, keeps cost down & fools most kids

This is most common for 1/18, 1/12 have more individual styling but most models will share parts. That's why you pay a premium for the likes of Minichamps.
The Minichamps are a combination. Usually even the fairings are metal, most small parts are plastic but the frame, stand, bars etc are metal. Don't be fooled into thinking they're stronger than the toys, these models are more frail than a tissue in the toilet.