Doing Squats and bench press VS bars

So I recently started lifting heavy (well heavy for me is light for most guys) & doing compound exercises. On weekdays, I go to my condo's gym which doesn't have a squat rack or bench press. But I use dumbbells to do to do those same exercises (they have a full set of dumbbells). On weekends I have access to a normal gym with all the equipment. I feel about the same when using either dumbbells or bars, is their a major advantage to using one or the other? I should point out I am trying to loose weight, so I only lift to retain LBM I know I really cannot gain muscle eating a deficit. So I am thinking in my case it won't matter much.

Also, I increase the weight only when I feel it's too easy and I can do more than 7 reps.

If it matters, I work out 6 days/week, alternating muscle groups, like A, B, A, B, etc.