I'll take a good dbol over sdrol any day. I find sdrol to lower my appetite quickly and if I can't eat, I can't grow. Thats not to say it isnt good. I have friends that have had good experiences with it. Just my personal taste. Both will give you good strength. Both can help you gain mass, quickly. Dbol seems to be more "wet" IME.
As for using an AI, yes, I use adex on dbol. I never would take dbol alone. Not a great plan. Most of your gains will be water and most of that weight will come off after your cycle, but if you run it with test, it'll allow you to put on weight fast and then as the test kicks in, you can continue to use that weight to help make gains through the test cycle. While on dbol, I tend to need a little more adex than when on test alone. Dbol has a high conversion rate! If you were taking 500mg test for 12 wks and started the first 6 wks out with 30mg dbol, I'd probably start with .5mg adex 3x wk and if you find you need more, increase the dose to EOD. Everyone is different though. Ideally, you want to use enough to control estrogen from causing issues like gyno, but you dont want to take off all of the fluid retention that dbol will give you.