I do actually like both of these critters, but Chandelure takes it in a landslide for me, personally. Mainly for the reasons mentioned above by Hikari, but also because it's just so damn powerful! It has an amazing design, and awesome typing and movepool, great stats where it matters... it's an all around amazing critter, and is probably my favourite Unova Pokemon, give or take an Excadrill.
Chandelure would probably beat anything that Kaori/Nica could throw at it in one of these polls, which is a shame as Jellicent is also kinda cool. The biggest thing working against is that it is kinda slow - which is a big deal with me - and its design is... interesting, to say the least. And not in a cool way. But it can be quite good to have on a team, and its typing is also very eclectic, which is another plus. It's a shame it's going up against such a strong opponent.
But, yeah. Chandelure. Hands down.