The poll and the OPs question I would answer in two different ways.

The Wyrmhero is blade is clearly better with status effects, HUGE combo rate, high evade and it looks awesome.

But you're asking which you should get, and there's pretty much no way you'll ever need wyrmhero blade once you get it because you have to have done so much in the first place. Get the tournesol if you really want to, I'm sure it's useful. But I never bothered as it took too long and wasn't THAT much better than Ultima Blade or Ragnarok.

Add to that the fact that when using bravery, berserk and haste on some with the masamune you usually do very fast, very long combos (got an 11 combo once) of 9999. It was my usual technique for bosses and its much better than I could have done with tournesol.