The Drake uses a 10180 battery and the Draco uses a 10280 battery. They have the same head but since the 10280 battery is longer, it has more energy and the Draco is brighter. The Drake is shorter then the Draco. I don't have one and I'm just repeating info from
Modamag's Drake thread.
The heads
are different, the Drake head is lower-power, the Draco brighter. The Draco
is multi-level (MAX...user-set...MIN), while the Drake is, I believe, single/fixed level.
They are interchangeable in that either head will screw into either battery body.
BUT
the 10180 battery can't safely drive the higher-current demands of the Draco head (at
least on highest settings).
Nominally, the Drake uses the 10180 battery tube, and is 10mm ("half" inch) shorter than
the Draco using the 10280 battery tube. (Optionally AAA battery extension tube is also
available: 10280 + extension == AAA, will fit both heads, giving longer runtimes, and the
AAA [aka 10440] LiIon is more-readily available, FWIW)
Bear in mind the Draco (the big klunkin' one) is
dwarfed by a tube of Chapstick. To put
it in another perspective, it's smaller than two Mag
bulbs!
The Draco (mine's Ti + TiCN) is one the best giggle-factor lights I've got: Tiny, and it's
Oh So Bright! People shrug and say "Yeah yeah another stupid little keychain LED light"
until I fire it up; then the usual response is "OH...MY...GAWD"
Yes, very expensive.
I'd spend the cough "few" dollars more on the Draco if I were getting just one. The Drake
(don't have one...
yet) is without doubt one of the smallest real ("serious") flashlights
available today. By real (serious), I mean, brighter than 2D Mag! I can trivially light up a
room with my Draco (on MAX, it's edged out by my Surefire L4, but not dramatically; the
Draco does tend to get warm...quickly).
Get one. Either one.
-RDH