Well the bread tube measure 3 and 3/4 inches while the cooltube is closer to 6 inches so it would obviously have more airflow and cool better. Would this be an issue on your particular grow? I have no idea. I live in a very hot part of the country and couldn't gamble on messing with anything over 250 in a pyrex tube. I'm not saying it wouldn't work for me just not worth the gamble/headache.
As far as cooltube versus aircooled hood, from what i've read, people seem to prefer the aircooled hoods. I think it has to do with the spreading of light. I, myself, have a cooltube and while i like it, the hood it has is pretty lame. In fact i'm prob gonna make another for it in the next few days.
I have no experience with aircooled hoods but some searching will get ya some more details/opinions for sure