Anecdotal Evidence:
I've ridden pretty hard with Cblast, with basically the same engine mods. Hard pulls from around 25mph to 180 or so, side by side. Both Cblasted, both with full systems. Sebastian has the M10, I've got the Brocks Single CT Meg.
Both systems make amazing power, sound fantastic, and provide excellent lean angle clearance. Other than a hp here or there, the power bands are the same. If you can swing it financially, the full system is worth the price to get the performance upgrade. Either system is fantastic, so it really comes down to style preference.
I of course prefer the Brocks, but The M10 is pretty damned nice and very well made!
2016 ZX-14R SE ABS (Harambike) - Brock's Ti Dual CT, 2WDW Flash, double bubble windscreen, Givi Tanklock 15L with 12v outlet, SW Motech Quick-Lock Evo Contour rack with Givi V35 bags, SW Motech tail mount with Coocase Wizard top box, KAOKO cruise control, fender eliminator, Vortex rearsets, Vortex V3 fuel cap, Vortex spools, Stompgrips, PSR SBK passenger pegs, Helibars risers, R&G radiator guard, frame plugs, Starrotors 55w 6K HIDs, Brembo MC/Rotors/Calipers, braided steel brake lines. 204hp/120tq
2013 ZX14R (Mjölnir)- Brock's Ti CT Meg, 2WDW Flash. 202hp 119tq. RIP
2008 Kawasaki ZX-10R trackfighter - Yoshimura R55, PCV, Servo Eliminator, Traxxion AK20 Cartridges, Penske Triple Clicker shock, EBC HH pads, Pirelli Superbike SC2 slicks, custom subframe, RSV4 tail, Ignition relocate, KX450F number plate, Apex adjustable clipons, CRG levers, Lever guards, Vortex rearsets, Stomp Grips, XT Lap Timer. 188hp, and not as much tq as the 14R!