Full details of the first three models are on Trevor's site. These are the 1998 Cobra and Cobra Deluxe along with the newer version launched in 2004. Since Trevor stopped updating his site there have been some changes to the model and some new Cobras launched
Changes The cobra prior to 2010 had 2 string trees and no truss rod cover. In 2010 there were changes including a new smaller type of pickups and one string tree still no truss rod cover. Around 2010/11 changed to no string tree and a truss rod cover has an angled headstock. Around 2015 Burns started producing the Cobra and the Marquee with the new Full contact trem unit which according to Barry Gibson provides better tuning stability, however that does not mean that some will not be produced with the old trem unit, apparently it depends on availability of parts.
At least three models have been launched since Trevor last updated his website. These are the King Cobra the King Cobra Custom and the Cobra Neomatic.
This is a current model made in China launched in 2014 the following information is taken from Burns web site and added to from seeing changes to the guitar.
The Burns King Cobra guitar is based on the '90s Drifter Custom and the double-cut body shape has a full and rounded form reminiscent of the '70s. The neck's gloss polyurethane finish is wider and flatter than the Fender equivalent of that era and the medium-gauge fretting is excellent and the white edge binding adds a finishing touch.
While many contemporary Burns fingerboards are buffed to a shine, this one exhibits the even dryness you would expect from quality Indian rosewood. One of the uniquely features of the King Cobra is the trio of Mini Tri-Sonic pickups that are designed to emulate the classic, larger-format vintage pickup's sound but in a smaller footprint.
Flamed maple top
22-fret Indian rosewood fingerboard
Three-piece alder body
Locking machine heads
Three mini Tri-Sonic pickups
The newer models feature 3 Neo Matic Pickups change occuring around 2015
Master volume and independent tone controls (with push/pull action for two extra pickup settings)
Five-way selector switch
Block neck inlays
Available in the following colours:
Honeyburst or Greenburst
Have recently seen 2015 or 2016 Models in Red and Baby Blue but Burns Website doesn't feature these colours.
Also a current model made in China and launched around the beginning of 2016. Again all the info I have is from the Burns website reproduced below
This design originates from the popular Drfiter Custom model with matching colour batwing style headstocks.
It features the new Burns knife edge tremolo system and has the low noise, high output Burns NEO-MATIK pickups.
Standard features are the bi-directional truss rod and the push-pull tone control that gives increased pick-up selections.
The guitar is available with a rosewood fingerboard, split three-ply mint green scratchplates and a choice of body colours.
Knife edge tremolo system
Burns® Neo-Matik® pickups
Three piece pickguards
5 position selector switch
Neck and middle pickup tone control
Bridge tone and push/pull pick up control
Front mounted jack socket
Available in the following colours:
Red, White, Black. Baby blue or Greenburst
King Cobra Custom
Not easy to find information on this guitar as far as I have been able to ascertain the guitar has 2 BaroMatik Humbuckers and as well as the three way switching uses the Varitone 5 way selector as on the Marquee MR2. They have a natural swamp ash or a flame top alder body.
Further information on the King Cobra Custom
I have seen one of these for sale on Ebay here is the Ebay description of a 2015 King Cobra
Currently retailing for £349.00. Grab a bargain and "Buy It Now" for £220.00.
Swamp Ash body. Maple Neck. Rosewood fretboard.
4 way Humbucker switching rotary control.*
Wilkinson Hot Zebra MWHZ IV Humbucker Pickups.** replacing original pickups
Metal Strap Locks replacing standard strap buttons
Machined steel Vibrato Block replacing standard zinc block.
Non-mud tone control.
In addition to the conventional 3 way [Bridge] - [Bridge & Neck] - [Neck] pickup selector there is a rotary switch in place of the first tone control to select the various coils:-
1) Full Humbuckers
2) Outside coils (tele).
3) Inside coils (strat)
4) Neck single & bridge Humbucker.
This Cobra sold for £200 on Ebay in January 2018. The seller claimed only 5 of these were made. He didn't know what was different about it but Barry Gibson had told him there were only 5 of them. The only significant difference I can see is the headstock, which has a single string tree and a truss rod cover.