Pretty sure they're the same yeah.
But I couldn't say for 100%

_________________
100% Meth / Fully forged / ACT 6 Puc & lightweight flywheel / monlar rods / wiseco pistons / arp studs / Versatune / corksport FMIC / Garrett GTX3076 / Brock Injector seals / Autotechs / Dreadnought & Juggernaut / GT RARB / Speedline front lower struts / Speedline lateral struts / corksport front braces / corksport rear upper braces / CS side braces /H&R springs / Bilstein B8's / CS BBK / Rear EBC Yellowstuff / JBR 5mm spacers / JBR OCC / Forge V2 / AWR 80a REM / 3" DP / Jetex / 3.25" Sure intake / Sure BSD / SURE TIG / Butterfly delete / EGR blockoff / Hel brake lines / Xcarlink / kendo SSP & Bushes / Step colder NGK 0.6mm gap / Fog and Driving light HID's / MKii alloys
Build thread http://tinyurl.com/otzp6qw
Helpful threads http://tinyurl.com/kjykgbd
http://www.ThroughTheLensMedia.co.uk
AVOID TOTAL MPS http://www.mpsowners.co.uk/viewtopic.php?f=64&t=20073

Glad you got it sorted in the end , i know the feeling :( going through it now

Hope you sort it. I'll get a coil pack and update if it fits ok from an MPS 3.

Hi Guys. I e-mailed Petch and their response was;
can supply the correct Genuine Mazda Coilpack for £87.93 inc vat each
Part number is L3G218100B.
Don't know whether this means they are different on the 6 (to the 3) or more likely genuine coil packs are more expensive. I've ordered one from Mazda for £97.00. Fitted a new battery (Bosch S4 as seen on the forum) so hopefully will soon be 100% sorted.