I played both routes once, not enough for an in-depth understanding of the route, but it was enough to pick up what you should and shouldn't do. Here are a few of my notes.
Dragons - This route is pretty powerful, early round the Apps are a good way to clear flak and keep your alliance safe. they also get one of the better ratios on CGs, so tend to get used pretty heavily. Later in the round, IG are some of the best armored lethal flak around. They have just enough health to be safe from RPGs/Strikers, and they are cheap and quick, so are great for countering rushes from most routes. Sorcs are very good at clearing Poms, probably the best unit in the game for it, as once the flak is cleared, they can put all their firepower onto the NLD. I'd pick them over bikers, as they do more damage, and can still be used to fight other troops aswell. Sirens are amazing for stopping TL and Snipers, very useful unit to keep RPG and TL off your back, as without them, you are vulnerable to both these routes. Witches are amazing health flak. They have just a bit of armor and are incredibly difficult to kill, they usually survived when none of my other troops would. The dragon unit is a bit over-hyped though, it does amazing damage, but it is also fairly squishy for an armored unit. You will want to flak it quite well with Golems and Witches.
Your targets should mostly be SA, RPG/TL (With lots of Sirens), Poms, and smaller strikers, depending on your route setup. You should avoid Harriers and Robos with lots of CW. Cybernetic Warriors will put a nasty dent in your troops, and mass harriers do surprisingly well against most of these troops.
Vamps - I had a lot of fun with this route. Early on, the skeletons and zombies are good for clearing flak, and zombies convert at a high rate, making them great for amassing score early-on, they are extremely squishy and only fire last tick though, so thats not advised. Were-Wolves are great lethal flak aswell, they are hard to kill, cheap, and fast, much like the witch, except they fire all ticks and convert a few of their kills. Gargoyles, if teched quickly enough, are great for rushing early on, I didn't spend much time with them, so I cannot speak for their usefulness later though. Mummies do add a bit to the route, they are seen for armor damage, but what people don't mention is how hard they are to kill. A fairly tough unit, if you get mid or last-ticked with armor, they can make the difference between a wining fight, and a losing fight. I wouldn't rely too heavily on them though, as they don't do enough armor damage to be worth massing. The vampire is what really sets the whole route apart. If you rush well enough, you can get vampires at least a day or 2 people anyone else gets SA or TL, making you a force to be reckoned with. They do a less HD and more AD than the SA, with the same initiative. They are slower and reveal ETA 2, so they aren't ideal for rushing active alliances (though still plausible) and you have to be on when attacks are eta 4 in an alliance to be there in time for defense. This route definitely has its routes set in solo or selfish play if you plan on massing Vampires, as SA tend to meet the HD need much better in an alliance, though taking longer to get to them.
Your targets will be RPG, TL, and Rangers for the most part. Vampires aren't AMAZING against rangers, but at a 2:1 ratio on them, they do better by themselves than most other single units. You will want to avoid Poms, SA (on your attack), and robo. Dragons depend on route setup, but most of the time, you won't want to attack them either.
Those are just my observations, you should really try them out and play with them a bit to find out how they best fit your play-style. I'm a hard-core alliance player, and tend to play for my alliance, rather than myself, so I tend to lean more towards how I can help my alliance. Most people prefer a balanced play-style, and it will reflect in how they play their routes, and some people play for their own enjoyment, find out what kind of player you are, and use that to determine how it will affect your game.