I know you have both as I do but curious on your thoughts.....
Raptor>Marquis?
I like them both - the Marquis wins in some areas, like coil-building, and the "crowned" positive screw. I prefer the stock double fully open draw on the Marquis over the fully open Raptor. I also like the "cap" on the Marquis, and it's easier to take the top off. I also like the options for the cap, to work with different length tips. I've become fond of removing the cap from a dripper when I need to re-drip. I don't like blind dripping so much anymore, I feel like not enough goes where I want it to, and the Marquis is easier for that for the above reasons. I love the included coil building rods as well. You get more "stuff" with the Marquis.
The Raptor wins in other areas - aesthetically it looks better to me, and it's shorter which is a positive. Single coils also work better in it due to the reduced chamber and the way the adjustable air flow works. It's also a hotter vape. I tend to run higher ohm builds in the raptor due to this - the same build I use in the Marquis is too hot in the Raptor. Flavor seems slightly better in the Raptor. The machining seems a little tighter on the raptor. I also prefer that the cap doesn't reach the base of the atomizer like the Marquis. I can take the Raptor off my mod without getting juice all over my hands because I had to pull the cap off and then unscrew the base.
It's a really tough call. I can't see myself doing without both, lol.