The only similarity between the 2, is that they are both night time scents, better off in cooler weather. Other than that, they are world's apart. The Dreamer seems to be more of an acquired taste while Le Male is more for the masses. Most people love Le Male, but The Dreamer may be a little harder to pull off. They're both powdery but not in a bad way, like Burberry Brit. Many dislike powdery frags, yet still love Le Male and The Dreamer. The powdery accord in both is never too overpowering, although definitely noticeable, where as in Brit, it's sickly, cloying, doesn't blend well with the rest of the fragrance and is competing for the top the entire time.
Back on the main topic though, the differences in THESE 2 are everything. The Dreamer is a bit more sophisticated, while Le Male is more for anyone. The Dreamer is basically tobacco/powder, Le Male is basically vanilla/powder. While of course there are lots of other notes you get whiffs of, the general layouts of these guys are as stated, at least to my nose. Vanilla may be a more versatile note, easier on the nose, which is while Le Male is such a big hit for many. The Dreamer focuses more on the tobacco which is more of an acquired taste, less versatile, and even harsh to some.
For somebody like myself, I'd go with The Dreamer probably. Mostly because I already have an inexpensive Le Male alternative called Cuba Gold, which rocks my world. It's better than Le Male imo, and the price is unbeatable. Over the years, Le Male has been very much copied, so it's not so original anymore. The Dreamer stands out much more, I have found little, if any fragrance that share similarities with it. My choice: The Dreamer.