The .35 with a 200 grain bullet is a great brush gun. The 260 will probably be a better 150 yard rifle though. Both will do the job if you do yours in putting the bullet where it needs to go.
I don't know how the terrain is where your hunting. In this part of Georgia, I would take the .35 every day of the week any time of year. Hunting in the summer your not going to have a 100 yard shot unless your staking out a power line or looking out across a pasture or crop field. Way down in south Georgia the terrain opens up a lot, and the 260 might seem the better option.