http://www.gerberonline.com/downloads/specs/Toilet/HE-21-311.pdf
The Gerber doesn't look that bad. 2" trapway instead of 2+1/8" for the Toto. But uit does have a nice rounded and smooth trapway. If the Gerber can take a regular round plunger, I'd probably lean towards the Gerber instead of the Toto that needs a trapezoidal plunger. As to clogging any toilet - don't use double ply paper, go instead with Scott 1-ply 1000 sheet paper and only use as much as from the paper dispenser to the floor, or about 2 feet at a time.
It's shortcoming is that it is at the regular 14.5" height. Most new toilets are now coming out in ADA heights. The problems usually surface when in the bathroom you have an extended counter top that goes over the tank lid. Then you have to make sure that the height is under 30". Probably about 28.5" to be able to remove the tank lid. Which doesn't make sense either because you won't be able to get to the innards.
That Gerber would probably be ideal for those that have baseboard heat behind the toilet. It doesn't have the largest water spot size though, at 58.796". The UltraMax II and Drake II 1.28G ADA have 65.015", whereas the Drake ADA has 85.59".
I don't know about the Gerber Power Flush but the Toto Drake is phenomenal. You can't really appreciate it until you see a Kohler without siphonic action slowly swirling and taking a long time to complete a full flush. With the Toto you depress the handle all the way down and let the handle go. That's it - "slurp," it's gone. It takes 20 seconds to refill the tank.
If your counter top is at 30.5" (30" high cabinet and 0.5" high counter top) then you will probably want a toilet that is that high, like the Eco Drake 1.2gpf CST744EL, which is 30.5". It probably doesn't matter to most people, though, as looks account for a lot, so a nice looking tank makes a big difference. The Drake II CST454, to me, is a masculine looking toilet. To me the Toto Entrada and the one piece toilets are feminine looking. Sorry, but to me the Gerber tank is hideous.The two-piece toilets usually have better MAP scores than one piece units and the ADA toilets have higher MAP scores than the regular height two piece toilets.
You may want to search for YouTube.com videos and look at all of them before making a decision.