TF-RDTA vs Troll

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Hey folks

I'm looking for a new RTA and my eyes fell upon the TF-RDTA and the Troll RTA, but I can't decide which one to choose.
I really like their builddecks, although I'm very suspicious about the insulator on the Troll. For now, the TF wins, because of it's fillport - I hate to unscrew topcaps, to fill my tanks.

So, what do you think? Which one is better? And why?

TF-RDTA vs Troll