Is there one specific brand of Thin CA and Thick CA that is the best or does age make the difference?

I can't speak scientifically, but I have used the name brands, the off brands, and even the Mil-Spec brands which I got for free when I worked for the Govt. (shhh, I didn't really say that) and I've never found a difference. They all hold the wood together, and they all go thick when they get old. Now my favorite brand is whatever my LHS has on sale.

Out of all the brands, I prefer ZAP! Combined with the tips you can buy, this is the only glue that I have consistantly used till empty. Many others have either dried up or clogged up to where I had to throw them away. No such animal as an anticlog tip. Maybe a slower than normal clog tip! The ZAP tips can be scraped or soaked and when it gets too bad you throw it away and grab another one withuot affecting the bottle. ZAPS good to the last drop!