Well Bloog is regulated 3.6 so a better comparison would be a different KR808D-1, Vapor4Life (3.7) vs Silver Bullet at 3.7
If SB is 3.7v unregulated like Vapor4Life is, that will come off the charger at 4.2v and drop to a plateau around 3.7v then drop off in voltage at the end of charge. AW IMR batteries have a flatter plateau but less charge (less mah) though still more mah than Bloog or Vapor4Life.
Slim ecigs should only use standard resistance attachments which is around 2.5 to 3 ohms - i.e. when you put a 2.5 ohms carto on one, that's as hot as they can get (Bloog cartos are close - 2.6ohm)
Batteries 450mah+ can use low resistance attys and cartos at least down to 2 ohms. Some won't go below 2 ohm on a mass produced enclosed big battery like Ego. Going below 1.7ohm on a mass produced enclosed battery actually has a chance of damage the electronics in the battery.
On mods, you are usually safe to go to 1.5 ohm (though the occasional mod will refuse)
So - on mods you can go hotter than on a slim ecig which is more hit and generally more vapor and using
juice up faster. It does not mean more flavor. I actually think flavor is usually delivered best by cooler setups though some say each juice has a wattage at which it tastes/feels best.
Also a mod like SB has a lot longer charge and replacement batteries cost less than 1/2 the cost of a Bloog battery.
And I think you can make SB be 6v. That doesn't interest me at all since the wealth of choices of ohms/cartos/attys is LR stuff which is not stuff usable at 6v. When you use 6v you need to instead use something like a 4ohm cartomizer as your "LR" hot end and I have no idea what you use if you don't want hot at 6v - I am guessing 3.7v.
Bottom line - if you don't want more heat or more hit (and probably bigger drags) that LR can give you, then a big bat gives you nothing but more charge, a big bat appearance and a stable base for a nice carto tank. And BTW when you do use LR hotter stuff, it uses the charge up faster.
(re stable base for a nice carto tanks - I just bought a fatter wood mod with that in mind)