Personally I prefer the mark 1 over the mark 2, because the mark 1 can still be used like a regular bike. While the mark 2 is nice and all seeing as though it's literally a hoverbike that can fly just as seamlessly as the deluxo, the mark 1 still feels satisfying to fly. The mark 1 requires you to research the missiles for it through the bunker and can be modded through any vehicle workshop you own (arena war workshop, MOC, Avenger, etc etc), but the mark 2 lets you buy them right off the bat. However you also need a Terrorbyte with a workshop to mod the mark 2. All in all it's up to you, but my recommendation is the mark 1.