Haven't watched the two side by side, or even in close proximity to each other but the one thing I know for a fact is that Hot Rod's colour is a lot more like I picture movie Hot Rod (pretty much Magenta).

I realise this isn't a great selling point, I've looked for comparisons myself up until the point it was a few dollars on Amazon and just decided to chance it. I feel like it is better, but maybe that's placebo + Hot Rod.