BLD vs ABC

Hi. I bought into BLD last year sub $3. It's been over 1 yr. I am thinking to sell out and buy into ABC as there may be more upside in ABC looking at the charts. I know the current CEO of boral is from ABC, that was a signal for me to hold on to BLD as he must know a lot of inside information from ABC.

Would you say their bussiness model are similar. I know ABC concentrate in Australia whereas BLD is in america as well as here..

Or i can just buy into ABC and hold onto BLD...