Would one get paid reletively the same 4 working for a union of a new company as the one they work for before?

So my boyfriend lives in Ohio making say $15/hr for a union that makes glassHe wants to get a new job in Michigan which means he will have to work for a different union companySince he is experienced, will he paid fairly the same if he says in the same field? PLease give me good sources on where I can find legitimate information on thisThanks.

Well I wouldnt know where to look this up at, butI can say this from experiance, I drive truck in ohio, union crane operators that load my truck here make about 16 17 an hour, in MI they are make upward of 22 23