I would not be surprised by the looseness in live 6-max; people there are only playing 1-table where online you can be against knowledgable multitablers playing more than 8-tables at once and being more tight than usual, although you're still in a very aggressive game type (6-max), regardless it's live or online.
You should continue using the exact same 6-max chart in live games if that serves you well, although try to balance by folding some hands you were used to raise routinely in online 6-max, like say
Q9s in button/co if these people keep calling you anyhow, thinking you're very loose for a 6-max. I would get tighten a bit with these marginal late raises, but not so much, mostly because my usual 6-max late street hand raises are not getting respect.
On the other hand, i would be much more aggressive (that means more $$ goes to pot) with my monster hand like
AKo and overpairs. If these guys keep calling you preflop, make them call more money to balance your loses.
You're just playing in 1-table against people who may be not used in 6-max aggression or not playing online at all and be annoyed a bit, thinking you're reckless, although this is just a guess.