yeah,
I've been checking the differences in the 2009 box compared to the 2014.
The Rules exactly the same, with clarifications on line of sight.
Tiles..
The 2014 ones have a much more colour saturation and some of the greys in the tiles have a bit of a red tint.
In 2009 the colours are more muted and the greys are a darker grey.
2014 on top
2009 below.

2014 on top
2009 below
Not a big difference.
Which is great I want to mix the sets, Mega sPulk!
OK
What's new?
Basically 19 bits of extra card.
10 extra tiles.
2 torps and ramps
4 breach counters and a 'turn' counter.

1x big room (new)
1x elevator (new)
2x elevator entrys (new)
2x corridor end pieces. (new)
2x 1 square corridor. (new)
2x 2 squares corridor (old ...)
2x torpedos (new)
2x torpedo ramps (new)
The extra corridor sections are just extras... They don't do anything special in missions.
So what do they do?
Torpedos. only used in mission 1.
The space marine rolls a dice (on a 6 can choose) and the torpedo joins the map on the correspondingly numbered tile.
Sexy.

The big room, only used in mission 12, exposes all tiles not closed off by a door to the vacuum of space!!!
Lovely.
Elevator. only used in mission 8
you move the six square tile from one 'level' to the next.

Very cool.
Breach counters - only used in mission 13.

Dirty!
A different sand timer...
2014 is the one on the right. The other two are from 2009 sets.
I timed all three of my Space hulk sand timers.. I think they should be 3 mins.
2009 a - 2min 52sec
2009 b - 3min 01 sec
2014 . . - 2min 57sec

I use and recommend that people use 'SpaceClock'
An adjustable countdown timer. Set to 3 minutes as standard.
A beep marks each minute.
Plus a 30 seconds remaining beep followed by a beeps for each of last 10 seconds!
Final countdown!! Hurry!
Free.
https://itunes.apple.com/us/app/space-clock/id343187323?mt=8 You can add/remove time, useful if you want to give new players 5 minutes??
Or if you want to use the old rules of losing a minute if the squad leader dies. 2 minute turns!!
A turn counter token - some missions says run 12 turns etc but doesn't' tell you how/where to use the counter...
My guess is on the PSI track works best.

Slightly darker coloured dice. Old dice (two sets!) <<-->> New dice
Malibu Stacy's new hat indeed!
(sorry for the confusing photo, I have ten of the 2009 dice... you get five dice in both editions )
Missions.
Some tweaks on which marines are used in some missions.
New Missions marked in green
Panic...