Double twisting double back vs Full twisting double layout ???

The FIG is infamous for devaluing various skills each quad, especially if they have been performed a lot.  Their logic is simple: if this skill has been performed by many gymnasts then it's obviously too easy. Nevertheless, in the 2013 - 2016 quad the FIG actually upgraded the hardest skills on women's floor exercise: the the double twisting double back (AKA the double double or 'Silivas') and the full twisting double layout (FDL) from a G rating to an H rating.

I've seen many people on the gymternet argue about which skill is harder to throw, the double twisting double back (AKA the double double or 'Silivas') or the full twisting double layout (FDL) .

One way to deduct which skill is harder is to look at the active number of gymnasts performing the skill.  Looking at the 2012 London Olympics, 5 girls threw the double double during the competition: Jordyn Wieber (USA), Vanessa Ferrari (ITALY), Anastasia Grishina (RUS), Victoria Moors (CAN), Larisa Iordache (ROM).  Interestingly, not a single woman performed the full twisting double layout.  Perhaps because it is harder?

Perhaps another way to look at this conundrum is look at the skill right below.  For example, a double double is really just a full in with another twist.  Likewise, a FLO is just a double layout with a full twist.  A full in on floor is an E rating while a double layout is an F.

Personally I think the FLO is harder to chuck than the double double because of these reasons and more.  I've seen double doubles that are lacking in height (*cough*Anastasia Grishina *cough*) but in terms of form breaks, I have never seen a double double with ''bad form".  The gymnast always has her legs glued together throughout the tucked position.  On the other hand, I rarely see a double layout or a FLO with perfect form because it is so difficult to do so.  The gymnast always seems to have their legs separated at some portions if not all throughout the somorsault.  Sometimes the gymnasts pike a little as well.

Conclusion: The FLO is just a bit more difficult in my opinion.  However, in the end, it will all depend on the gymnasts individual abilities and talents :)