Difference between dumbells/What are the best dumbells

[=SMH=]

Is there a difference between hex dumbbells and regular dumbbells(the adjustable ones with the clips at the end)

This morning was the 1st time I've used the hex dumbbells, and the pumps when I was doing arm curls felt a lot more fuller. I just want to know if this is just a mental thing, where it just felt different because I was using it for the first time, or are they actually better.

http://www.leekangkoog.org/images/dumbells400.jpg
or these
http://www.ptinto.com/ao_dumbells.jpg

Which are better.

[=SMH=]

I see no one actually works out on this site.......

Just a bunch of pretenders.....:thumbsdow

[klyk21]

i prefer the hex (or dumbells w/o the screw on end). Don't think it matters much seeing as how they're the same weight. One time i was using the ones with the screw on end and that ish popped off mid bicep curl. Damn near busted my glass desk here in my room (1 or 2 inches from it). Ever since, i havent touched them.