Dirty Bulking vs Clean Bulking Which is Better for Bodybuilders

I have been having a debate at my gym in Leeds about dirty bulking vs clean bulking which is better for bodybuilders. Some of the older guys swear by eating everything in sight including pizza and burgers to get as big as possible. I am worried that I will just end up with a huge stomach and a lot of work to do when I eventually have to cut.

I prefer the clean approach with oats and sweet potatoes but it is so hard to get in four thousand calories without feeling bloated all day. It is tempting to just grab a takeaway when I am short on time and need the calories. I want to build quality tissue not just move the scale up.

Have any of you tried a dirty bulk and actually kept the muscle after the diet? I feel like the inflammation from poor food choices might actually hinder growth in the long run. I would appreciate some perspective from anyone who has experimented with both methods during their off season.