[Snowflakian]

I'm an equal fan of both, and have always been a green lantern fan. With that said on the even characters...

I tend to prefer the modern 3.75'' Marvel Figures. Better sculpts, better articulation, and just all around more poseable and fun. They also include accessories.

DCIH which is my DC line of choice, while gradually improving the articulation, lacks accessories. I do give them kudos for doing jay garrick and other lower knowns so soon. But Lanterns without power batteries, female figures having v-cut legs, shoulder articulation and head rotation, just seems like they are still making DC figures in the 80s.
Comparing Ms. Marvel to Raven/starfire/Star Saphire just isn't even fair. Ms. Marvel/Firestar are clear winners. Female sculpt with articulation that doesn't hinder detail that allows for a multitude of poses.

So for now, I prefer Marvel, simply for the fair treatment they've given to all genders in sculpts and articulation.

All that's for the 3.75'' lines though.

When it comes to the collector lines...
Marvel wins again. Legends has better bigger BAFs, better detail, and again, the better articulation. Mattel in the DC counterpart makes what looks to me like wrestling toys in DC costumes.

It's only once we get over to the Direct figure market, that my opinion turns.
While DC Direct is lacking somewhat in articulation they do make up for it in characters, regularity, and even a Green Lantern Specific line. Whereas Marvel Direct is slow with the characters, and hasn't done many to any characters I'd want.

So I guess for me it boils down to this as the final result.

3.75'' Winner: Marvel Universe. (Great sculpts, great articulation, no real gender bias on articulation.)
6'' Winner: Marvel Legends. (Covers a wide array of characters with great articulation and massive BAFs)
Direct Winner: DC (Multitude of lines covering all sorts of characters we may never see otherwise.)

In the 90s, Kenner also surprised us with the Total Justice/JLA line. Great sculpts, low articulation, but the accessories made up for it. Compared to Toy Biz's marvel lines at the same time(this was right before legends), DC won flat out. Those were some of my favorite toys as I grew up reading the Kyle Rayner GL run. And though I watched and read X-Men back then, the figures in comparison were too basic and simple, with extremely low detail, and ugh, action features that hindered play value.
Marvel has come a long way. It's a shame that DC has done an about face almost since they've switched companies. While they've improved the articulation, they just don't have that same sculpting magic they had back with Kenner. Even the duplicates that were released were amazingly neat figures, like the Flash Atom blue beetle three pack, or the Green Lantern Dr. polaris two pack.

I'd like to see what Hasbro could manage now with the DC license after all they've done on MU. From the accessories to the poses and even the sculpts. It'd just be nice to have Blackest night, or Emerald Twilight, even Superman Red or Blue, or brainiac 13 like figures in those scales with faithful accurate detailed sculpts.

So while I love me some green lantern. Marvel wins hands down for modern lines.
But until X-Force X-23 is made, Mattel can still catch up if they overhaul some aspects of their DCIH lines. The new articulation is a great start. But they still need accessories, stands, and to correct the gender biased articulation. It sucks that starfire can't even make a decent flight pose. Or Raven a decent using her powers pose. Or even wonderwoman or more even being able to do a decent pose at all, or even stand without help. =/