Hey bad, I didn't realize your blogs were so popular!
What makes Phiniac better than IBTanked?
Well, I would argue that they aren't "better". I'll likely ruffle some feathers with that statement...
The Phiniac's glass is a slightly thicker than IBTanked's, but according to OCD (IBTanked) that doesn't mean it's more shatter proof. This depends upon how the glass is anealed (heat process) in a firing kiln to make it more durable. Both manufacturers aneal their own glass tubes. My one Phiniac cracked, none of my 12 IBTanked's have cracked.
IBTanked offers more tank size variations than Phiniac. IBTanked offers three tank lengths: halfling (shorty), standard, & XL. Phiniac only offers standard and XL. IBTanked has four diameters: 15, 19, 22, & 25 mm. Phiniac only has two diameter sizes: 22 mm & the skinny phinny (? diameter).
Phiniac's default end caps are made of black delrin (plastic); titanium metal caps (silver or anodized colors) are extra ($19). IBTanked offers stainless steel for all tank sizes, and anodized aluminum (in several colors) for the all sizes except the 25 mm diameter.
IBTanked offers custom hand-painted designs for their pyrex tubes which are fire annealed for durability. Phiniac offers textured glass tubes, custom sand-blasted designs in color, frosted glass, custom hand-blown 3D designs, and colored glass.
IBTanked's cheapest tank is $16 (tiny tank) and $22.50 and up (other tanks). Phiniac's cheapest tank is $32 (Skinny Phinny) and $38 and up (other tanks). Customized tanks for both vendors have additional costs.
For the money, IBTanked offers the same quality for less cost than Phiniac, IMHO. Both tanks are high quality tanks, and represent the top pyrex tanks on the market.